CL- 5 - MATH- FACTORS AND MULTIPLES- Revision worksheet- 2
1. If one number divides exactly into another with no remainder, we say the second
number is a multiple of the first number
Eg. 6 divides
exactly into 12, therefore 12 is a multiple of 6.
5 divides
exactly into 45, therefore 45 is a multiple of 5.
2. Which of these statements are true and which are
false? (put a tick mark for
true and cross for false)
a) 16 is a multiple of 4 b) 42 is a multiple of 7
c) 15 is a multiple of 2 d) 100 is a multiple of 3
e) 40 is a multiple of 4 and 10 f) 27 is a multiple of 3 and 9
2. Write three multiples of 7 smaller than 50. ______________________________
3. Circle the
multiples of 6. - 23, 50, 48, 24, 67, 30, 42
4. Circle the
factors of 45. - 9, 90, 180, 7, 1, 15, 3, 5
5. Write a
multiple of 37 between 100 and 120. _____________
6. Write the missing multiples
a) 7 ____ 21 ____ ____ ____ ____ ____ ____
b) 4 ____ ____ ____ 20 ____ ____ ____ ____
c) 99 88 ____ ____ ____ ____ ____ ____ 11
d) 81 72 ____ ____ ____ ____ ____ ____ ____
7. Find factors
by completing these factor trees
a) 50
5 ______
______ ______
_____ X ______ X _____ = 50
b) 18
2 ______
______ ______
_____ X ______ X _____ = 18
8. Write the
least prime number which is greater than 24.
_______
9. Write the
prime factorisation of the following numbers.
a) 356
b)120
10. Find the H.C.F.
of the following numbers by division method
a) 198 and 360 b)
40 and 76
11. Find L.C.M. by prime factorization
a) 12, 18, 25 b)
16, 48
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