Buds Public School , Dubai
Gr 4 :
Mathematics/ Factors and Multiples
Name:
Fill in the blanks with correct answer.
1. ________is neither composite number nor a prime number.
2. The only even prime number is ___________________
3. A prime number has only _______factors, ___________and
________________
4. The smallest prime number is___________________
5. ______________is the smallest composite number.
6. There are _________primes less than 20.
7. Complete the set of multiples of
a. 5. 5, 10, _____, _______, _______, ________, ______, _______
b. 4: 4, 8 ,
_____, _______, _______, _______, ______, _____
c. 8: 8, 16,
_____, _______, _______, _______, _______, _____
d. 7 : 7, 14, _____, _______, _______, _______, _______, _______
8. Circle the multiples of 12
16, 32,
24,
44 , 60 , 84,
92
9. Circle the multiples of 11
33, 56, 77, 98 , 99 , 143, 567, 264
10. Circle the multiples of 3
33, 35, 45, 90, 432, 606, 322, 505
11. Circle the multiples of 6
232, 540, 606, 723, 507, 334, 810
12. Do the prime factorisation by factor tree
13. Write the missing factors
4 x ____= 20
8 x _____= 24
5 x ____= 25
6 x ____ = 30
____ x 8 = 32
___ x 6 = 36
4 x ___ = 60
____ x 7 = 63
___ x 9 = 90
8 x ___ = 56
_____ x 8 = 48
_____ x 5 = 45
14. Identify the prime numbers and add them together.
1
3
18
7
11
15
19
25
6
10
16
23
Total =
15. Complete the equation and circle the answers which are prime numbers.
7 x5 =
15 + 14 =
10 +11=
12 ÷ 2=
60-29 =
4x8=
7x7 =
23-20 =
36+11 =
32-27 =
35 ÷ 5 =
22 + 75 =
16. Tick the numbers in the following problems that are divisible by the numbers
shown against them.
a. 5, 26, 43, 97,
b. 14,
27,
66,
111,
72,
128, 217,
423,
928 by 2
85, 102, 324, 906, by 3
c. 21, 30, 54, 82, 114, 156, 804, 915 by 6
d. 45, 56,
65, 90, 23, 90, 54, 9990 by 5
e. 80, 303, 300, 90, 45, 67, 200, 406, 40 by 10
13. Is 34 is a factor of 272?
14. Is 19 is a factor of 399?
15. Is 16 is a factor of 241?
16. Is 7 is a factor of 133?
17. Fill in the missing place.
18. Find prime factorisation given below. See example.
19. Colouring fun.
Colour all odd numbers
Colour all multiples of 3
Colour all even numbers
Colour all prime numbers