In this page we have worksheet for Class 6 Maths Prime time . Hope you like them and do not forget to like , social share
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Multiple Choice Questions
Question 1
Which of these is the factor of 50.
a. 10
b. 3
c. 7
d. 6 Question 2
What is the Sixth multiple of 13?
a. 78
b. 65
c. 52
d. 91 Question 3
Which of them is a prime number?
a. 13
b. 14
c. 28
d. 25 Question 4
Which of them is a composite number?
a. 45
b. 11
c. 31
d. 13 Question 5
The number of multiples of a given number is
a. 10
b. 100
c. 1000
d. infinite Question 6
The smallest composite number is
a. 4
b. 1
c. 9
d. 6 Question 7
What are Two numbers called having only 1 as a common factor.
a. co-prime numbers
b. twin prime numbers
c. composite numbers
d. prime numbers.
Question 8
The smallest odd composite number is
a. 5
b. 15
c. 9
d. 3 Question 9
Find the smallest 4-digit number which is divisible by 6, 8, 9
a. 2012
b. 2160
c. 2088
d. 2016 Question 10
The LCM of two co-prime numbers is
a. their sum
b. their product
c. their difference
d. none of these Question 11
Which of the following is false?
a. The number 2 and 3 are co-prime
b. The numbers 41 and 43 are twin primes
c. The number 5,28 are co-prime
d. none of these Question 12
Match the items in column I and column II.
Which of the following is true?
(a) P -> E, Q -> D,R-> A, S-> B,T->C
(b) P -> D, Q -> E,R-> A, S-> A,T->C
(c) P -> E, Q -> D,R-> B, S-> A,T->C
(d) P -> E, Q -> D,R-> A, S-> C,T->B Question 13
Which of the following number is the product of exactly three distinct prime number?
a. 20
b. 45
c. 147
d. 165
Question 14
Which of the following pair is not co-prime?
α. 11, 12
b. 73,74
C. 97,98
d. 84,94
AnswerAnswer
(1)a
(2) a
(3) a
(4) a
(5) d
(6) a
(7) a
(8) c
(9) d
(10) b
(11) (d)
(12) (a)
(13) d
(14) d
short answer type
Question 1
Sort out even and odd numbers: 13, 28, 41, 99, 50, 255, 132, 664, 59, 29, 71, 165, 14
Answer
Even Numbers(Numbers divided by 2): 14,28,50,132,664
Odd Numbers( Numbers not divided by 2) : 13,29,41,59,71,99,165,255
Question 2
Determine the smallest three-digit number which is exactly divisible by 6, 8 and 12.
Answer
First we need to find the LCM of 6,8,12
LCM of 6,8,12 =24
Now multiple of 24 will be
24 ,48,72, 96,120,144
So smallest three digit number will be 120
Question 3
Find the prime factorization of 4900
Answer
4900 = 2 x 2 x 5 x5 x 7 x 7
Question 4
Write seven consecutive composite numbers less than 100 so that there is no prime number between them.
Answer
90, 91, 92, 93, 94, 95 and 96 are seven consecutive numbers and there is no prime number between them.
Question 5
Using divisibility test, determine which of the following numbers are divisible by 2; by 3; by 4; by 5; by 6; by 8; by 9; by 10; by 11.
Answer
Question 6
Fill in the blanks
a. Every multiple of a given number is greater than or equal to that ________.
b. The number _____ is the smallest prime number and is even.
c. HCF of 10 and 15 is _____.
d. First three multiples of 11 are ________.
e. The HCF of two co- prime numbers is __________.
f. The LCM of two co-prime numbers is __________.
g. If two given numbers are divisible by a number, then their _______ and ________also divisible by that number.
h. A number is divisible by ______, if it is divisible by both 3 and 6.
i. HCF of 11 and 44 is _____.
j. The numbers which are not multiple of 2 are called ________ numbers.
k. The numbers which are a multiple of 2 are called ______ numbers.
l. First two multiples of 8 are ________.
Answer
(a)Number
(b) 2
(c) 5
(d) 11,22,33
(e) 1
(f) Product of numbers
(g) Sum and difference
(h) 2
(i) 11
(j) odd
(k) even
(l) 8,16
