{"id":3984,"date":"2026-05-24T15:04:29","date_gmt":"2026-05-24T15:04:29","guid":{"rendered":"https:\/\/physicscatalyst.com\/testprep\/class-8-math\/tales-by-dots-and-lines-class-8-mcq\/"},"modified":"2026-05-24T15:04:29","modified_gmt":"2026-05-24T15:04:29","slug":"tales-by-dots-and-lines-class-8-mcq","status":"publish","type":"post","link":"https:\/\/physicscatalyst.com\/testprep\/class-8-math\/tales-by-dots-and-lines-class-8-mcq\/","title":{"rendered":"Tales by Dots and Lines class 8 MCQ"},"content":{"rendered":"<script type=\"text\/javascript\" >\ndocument.addEventListener(\"DOMContentLoaded\", function(event) { \nif(!window.jQuery) alert(\"The important jQuery library is not properly loaded in your site. Your WordPress theme is probably missing the essential wp_head() call. You can switch to another theme and you will see that the plugin works fine and this notice disappears. If you are still not sure what to do you can contact us for help.\");\n});\n<\/script>  \n  \n<div  id=\"watupro_quiz\" class=\"quiz-area single-page-quiz\">\n<p id=\"submittingExam521\" style=\"display:none;text-align:center;\">Please wait...<br><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/physicscatalyst.com\/testprep\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\"><\/p>\n\n<div class=\"watupro-exam-description\" id=\"description-quiz-521\"><p><strong>General Instructions<\/strong><\/p>\n<ul>\n<li>Your test contains multiple-choice questions with only one answer-type question. There are a total of 10 questions<\/li>\n<li>This is a 20 min test. Please make sure you complete it in the stipulated time<\/li>\n<li>You can finish this test any time using the 'Submit' button.<\/li>\n<\/ul>\n<\/div>\n\n<form action=\"\" method=\"post\" class=\"quiz-form\" id=\"quiz-521\"  enctype=\"multipart\/form-data\" >\n<div class='watu-question ' id='question-1' style=';'><div id='questionWrap-1'  class='   watupro-question-id-8646'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>1. <\/span>if the mean of 10 numbers is 47.5, then sum of the numbers is<\/div><input type='hidden' name='question_id[]' id='qID_1' value='8646' class='watupro-question-id'\/><input type='hidden' id='answerType8646' class='answerTypeCnt1' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8646'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8646[]' id='answer-id-34532' class='answer   answerof-8646  ' value='34532'   \/><label for='answer-id-34532' id='answer-label-34532' class=' answer'><span>475<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8646[]' id='answer-id-34533' class='answer   answerof-8646  ' value='34533'   \/><label for='answer-id-34533' id='answer-label-34533' class=' answer'><span>500<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8646[]' id='answer-id-34534' class='answer   answerof-8646  ' value='34534'   \/><label for='answer-id-34534' id='answer-label-34534' class=' answer'><span>47.5<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8646[]' id='answer-id-34535' class='answer   answerof-8646  ' value='34535'   \/><label for='answer-id-34535' id='answer-label-34535' class=' answer'><span>600<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-2' style=';'><div id='questionWrap-2'  class='   watupro-question-id-8647'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>2. <\/span>if a value less than median is added, then median will<\/div><input type='hidden' name='question_id[]' id='qID_2' value='8647' class='watupro-question-id'\/><input type='hidden' id='answerType8647' class='answerTypeCnt2' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8647'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8647[]' id='answer-id-34536' class='answer   answerof-8647  ' value='34536'   \/><label for='answer-id-34536' id='answer-label-34536' class=' answer'><span>increase<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8647[]' id='answer-id-34537' class='answer   answerof-8647  ' value='34537'   \/><label for='answer-id-34537' id='answer-label-34537' class=' answer'><span>decrease<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8647[]' id='answer-id-34538' class='answer   answerof-8647  ' value='34538'   \/><label for='answer-id-34538' id='answer-label-34538' class=' answer'><span>stay same<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8647[]' id='answer-id-34539' class='answer   answerof-8647  ' value='34539'   \/><label for='answer-id-34539' id='answer-label-34539' class=' answer'><span>double<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-3' style=';'><div id='questionWrap-3'  class='   watupro-question-id-8648'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>3. <\/span>The mean of the numbers 8, 13, 10, 4, 5, 20, y, 10 is 10.375. Find the value of y<\/div><input type='hidden' name='question_id[]' id='qID_3' value='8648' class='watupro-question-id'\/><input type='hidden' id='answerType8648' class='answerTypeCnt3' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8648'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8648[]' id='answer-id-34540' class='answer   answerof-8648  ' value='34540'   \/><label for='answer-id-34540' id='answer-label-34540' class=' answer'><span>14<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8648[]' id='answer-id-34541' class='answer   answerof-8648  ' value='34541'   \/><label for='answer-id-34541' id='answer-label-34541' class=' answer'><span>15<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8648[]' id='answer-id-34542' class='answer   answerof-8648  ' value='34542'   \/><label for='answer-id-34542' id='answer-label-34542' class=' answer'><span>13<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8648[]' id='answer-id-34543' class='answer   answerof-8648  ' value='34543'   \/><label for='answer-id-34543' id='answer-label-34543' class=' answer'><span>12<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-4' style=';'><div id='questionWrap-4'  class='   watupro-question-id-8649'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>4. <\/span>Find the median of 8, 10, 19, 23, 26, 34, 40, 41, 41, 48, 51, 55, 70,84, 91, 92.<\/div><input type='hidden' name='question_id[]' id='qID_4' value='8649' class='watupro-question-id'\/><input type='hidden' id='answerType8649' class='answerTypeCnt4' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8649'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8649[]' id='answer-id-34544' class='answer   answerof-8649  ' value='34544'   \/><label for='answer-id-34544' id='answer-label-34544' class=' answer'><span>48<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8649[]' id='answer-id-34545' class='answer   answerof-8649  ' value='34545'   \/><label for='answer-id-34545' id='answer-label-34545' class=' answer'><span>51<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8649[]' id='answer-id-34546' class='answer   answerof-8649  ' value='34546'   \/><label for='answer-id-34546' id='answer-label-34546' class=' answer'><span>41<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8649[]' id='answer-id-34547' class='answer   answerof-8649  ' value='34547'   \/><label for='answer-id-34547' id='answer-label-34547' class=' answer'><span>34<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-5' style=';'><div id='questionWrap-5'  class='   watupro-question-id-8650'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>5. <\/span>if the every value in the data set is multiplied by the number 4,then mean will be<\/div><input type='hidden' name='question_id[]' id='qID_5' value='8650' class='watupro-question-id'\/><input type='hidden' id='answerType8650' class='answerTypeCnt5' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8650'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8650[]' id='answer-id-34548' class='answer   answerof-8650  ' value='34548'   \/><label for='answer-id-34548' id='answer-label-34548' class=' answer'><span>increases by 4 times<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8650[]' id='answer-id-34549' class='answer   answerof-8650  ' value='34549'   \/><label for='answer-id-34549' id='answer-label-34549' class=' answer'><span>decreases by 4 times<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8650[]' id='answer-id-34550' class='answer   answerof-8650  ' value='34550'   \/><label for='answer-id-34550' id='answer-label-34550' class=' answer'><span>stay unchanged<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8650[]' id='answer-id-34551' class='answer   answerof-8650  ' value='34551'   \/><label for='answer-id-34551' id='answer-label-34551' class=' answer'><span>increase by 4 <\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-6' style=';'><div id='questionWrap-6'  class='   watupro-question-id-8651'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>6. <\/span>Adding a value less than mean will<\/div><input type='hidden' name='question_id[]' id='qID_6' value='8651' class='watupro-question-id'\/><input type='hidden' id='answerType8651' class='answerTypeCnt6' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8651'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8651[]' id='answer-id-34552' class='answer   answerof-8651  ' value='34552'   \/><label for='answer-id-34552' id='answer-label-34552' class=' answer'><span>decrease the mean<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8651[]' id='answer-id-34553' class='answer   answerof-8651  ' value='34553'   \/><label for='answer-id-34553' id='answer-label-34553' class=' answer'><span>increase the mean<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8651[]' id='answer-id-34554' class='answer   answerof-8651  ' value='34554'   \/><label for='answer-id-34554' id='answer-label-34554' class=' answer'><span>stay same<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8651[]' id='answer-id-34555' class='answer   answerof-8651  ' value='34555'   \/><label for='answer-id-34555' id='answer-label-34555' class=' answer'><span>None of these<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-7' style=';'><div id='questionWrap-7'  class='   watupro-question-id-8652'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>7. <\/span>Find the mean of\u00a0 35,46,76,67,48,20,24,28<\/div><input type='hidden' name='question_id[]' id='qID_7' value='8652' class='watupro-question-id'\/><input type='hidden' id='answerType8652' class='answerTypeCnt7' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8652'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8652[]' id='answer-id-34556' class='answer   answerof-8652  ' value='34556'   \/><label for='answer-id-34556' id='answer-label-34556' class=' answer'><span>45<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8652[]' id='answer-id-34557' class='answer   answerof-8652  ' value='34557'   \/><label for='answer-id-34557' id='answer-label-34557' class=' answer'><span>39<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8652[]' id='answer-id-34558' class='answer   answerof-8652  ' value='34558'   \/><label for='answer-id-34558' id='answer-label-34558' class=' answer'><span>43.5<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8652[]' id='answer-id-34559' class='answer   answerof-8652  ' value='34559'   \/><label for='answer-id-34559' id='answer-label-34559' class=' answer'><span>43<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-8' style=';'><div id='questionWrap-8'  class='   watupro-question-id-8653'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>8. <\/span>If each value is increase by 10, then mean will<\/div><input type='hidden' name='question_id[]' id='qID_8' value='8653' class='watupro-question-id'\/><input type='hidden' id='answerType8653' class='answerTypeCnt8' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8653'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8653[]' id='answer-id-34560' class='answer   answerof-8653  ' value='34560'   \/><label for='answer-id-34560' id='answer-label-34560' class=' answer'><span>increase by 10<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8653[]' id='answer-id-34561' class='answer   answerof-8653  ' value='34561'   \/><label for='answer-id-34561' id='answer-label-34561' class=' answer'><span>decrease by 10<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8653[]' id='answer-id-34562' class='answer   answerof-8653  ' value='34562'   \/><label for='answer-id-34562' id='answer-label-34562' class=' answer'><span>stay same<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8653[]' id='answer-id-34563' class='answer   answerof-8653  ' value='34563'   \/><label for='answer-id-34563' id='answer-label-34563' class=' answer'><span>None of the above<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-9' style=';'><div id='questionWrap-9'  class='   watupro-question-id-8654'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>9. <\/span>A cricket team\u2019s average score in six matches is 92 runs. The scores are 72, 78, 82, 88, and 92. Find the score of sixth match.<\/div><input type='hidden' name='question_id[]' id='qID_9' value='8654' class='watupro-question-id'\/><input type='hidden' id='answerType8654' class='answerTypeCnt9' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8654'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8654[]' id='answer-id-34564' class='answer   answerof-8654  ' value='34564'   \/><label for='answer-id-34564' id='answer-label-34564' class=' answer'><span>92<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8654[]' id='answer-id-34565' class='answer   answerof-8654  ' value='34565'   \/><label for='answer-id-34565' id='answer-label-34565' class=' answer'><span>140<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8654[]' id='answer-id-34566' class='answer   answerof-8654  ' value='34566'   \/><label for='answer-id-34566' id='answer-label-34566' class=' answer'><span>102<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8654[]' id='answer-id-34567' class='answer   answerof-8654  ' value='34567'   \/><label for='answer-id-34567' id='answer-label-34567' class=' answer'><span>128<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-10' style=';'><div id='questionWrap-10'  class='   watupro-question-id-8655'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>10. <\/span>The mean of 6 number is 15.if one number is removed means becomes 13, what is the removed number<\/div><input type='hidden' name='question_id[]' id='qID_10' value='8655' class='watupro-question-id'\/><input type='hidden' id='answerType8655' class='answerTypeCnt10' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8655'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8655[]' id='answer-id-34568' class='answer   answerof-8655  ' value='34568'   \/><label for='answer-id-34568' id='answer-label-34568' class=' answer'><span>20<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8655[]' id='answer-id-34569' class='answer   answerof-8655  ' value='34569'   \/><label for='answer-id-34569' id='answer-label-34569' class=' answer'><span>25<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8655[]' id='answer-id-34570' class='answer   answerof-8655  ' value='34570'   \/><label for='answer-id-34570' id='answer-label-34570' class=' answer'><span>24<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8655[]' id='answer-id-34571' class='answer   answerof-8655  ' value='34571'   \/><label for='answer-id-34571' id='answer-label-34571' class=' answer'><span>16<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div style='display:none' id='question-11'>\n\t<div class='question-content'>\n\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/physicscatalyst.com\/testprep\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\" \/>&nbsp;Loading...\t<\/div>\n<\/div>\n\n<br \/>\n\t\n\t\t\t<div class=\"watupro_buttons flex \" id=\"watuPROButtons521\" >\n\t\t  <div id=\"prev-question\" style=\"display:none;\"><input type=\"button\" value=\"&lt; Previous\" onclick=\"WatuPRO.nextQuestion(event, 'previous');\"\/><\/div>\t\t  \t\t  \t\t   \n\t\t   \t  \t\t<div><input type=\"button\" name=\"action\" class=\"watupro-submit-button\" onclick=\"WatuPRO.submitResult(event)\" id=\"action-button\" value=\"SUBMIT\"  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