Summative Assessment-I Mcq Math Worksheets And Practice Questions - Class Vi - 2014-2015 Page 21
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46PRACTICE QUESTIONS
CLASS - VI: CHAPTER - 3
PLAYING WITH NUMBERS
1.
Write all the factors of 68.
2.
Write first five multiples of 6.
3. Write all the factors of the following numbers :
(a) 24 (b) 15 (c) 21
(d) 27 (e) 12 (f) 20
(g) 18 (h) 23 (i) 36
4. Write first five multiples of : (a) 5 (b) 8 (c) 9
5.
Find all the multiples of 9 upto 100.
6.
Write all the prime numbers less than 15.
7. The numbers 13 and 31 are prime numbers. Both these numbers have same digits 1 and 3. Find
such pairs of prime numbers upto 100.
8. Express the following as the sum of two odd primes.
(a) 44 (b) 36 (c) 24 (d) 18
9. Express each of the following numbers as the sum of three odd primes:
(a) 21 (b) 31 (c) 53 (d) 61
10.
Write five pairs of prime numbers less than 20 whose sum is divisible by 5.
11.
Give three pairs of prime numbers whose difference is 2.
12. Using divisibility tests, determine which of the following numbers are divisible by 4; by 8:
(a) 572 (b) 726352 (c) 5500 (d) 6000 (e) 12159
(f) 14560 (g) 21084 (h) 31795072 (i) 1700 (j) 2150
13. Using divisibility tests, determine which of following numbers are divisible by 6:
(a) 297144 (b) 1258 (c) 4335 (d) 61233 (e) 901352
(f) 438750 (g) 1790184 (h) 12583 (i) 639210 (j) 17852
14. Using divisibility tests, determine which of the following numbers are divisible by 11:
(a) 5445 (b) 10824 (c) 7138965 (d) 70169308 (e) 10000001
(f) 901153
15.
Find the common factors of 75, 60 and 210.
16.
Find the common multiples of 3, 4 and 9.
17.
Write all the numbers less than 100 which are common multiples of 3 and 4.
18. A number is divisible by both 5 and 12. By which other number will that number be always
divisible?
19.
A number is divisible by 12. By what other numbers will that number be divisible?
20.
Find the prime factorisation of 980.
21. Write the greatest 4-digit number and express it in terms of its prime factors.
22. Write the smallest 5-digit number and express it in the form of its prime factors.
Prepared by: M. S. KumarSwamy, TGT(Maths)
Page - 21 -
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