Be My Multiple, I Will Be Your Factor | CBSE Class 5 Maths Practice Problems

Test book solutions of this chapter can be found here.

More practice problems for this chapter can be found here.

Given below are practice problems for this chapter that you can attempt to score higher in your exam.

Be My Multiple, I’ll be your factor | Class 5 Mathematics – Model Questions

1. Find the factors of 18.

2. Write the first multiples of the given numbers

i) 9
i) 100

3. Complete the pattern

i) 5, – , – , – , 25, – , –
ii) 4, 8, – , – , – , – , 28

4. Find the LCM of the given numbers

a) 3, 8
b) 6, 9

5. Write the common factors and HCF of the following numbers

i) 8 and 12
ii) 16 and 24

6. Find the HCF of 12, 36 and 48

7. Write the prime numbers between 1 and 20.

8. Write the composite numbers between 1 and 20.

9. Manu has some plants which can be arranged in rows of 4, 7 or 14. What is the least number of plants which can be arranged in this manner?

10. Sonu purchases two bags of rice of weights 15 kg and 20 kg. Find the maximum value of weight which can measure the weight of the rice exact number of times.

Answers

1. The factors of 18 are 1, 2, 3, 6, 9 and 18.

18 = 1x 18
18 = 2 x 9
18 = 3 x 6

2. i) The first five multiples of 9 are 9, 18, 27, 36, 45.

ii) The first five multiples of 100 are 100, 200, 300, 400, and 500.

3. i) 5, 10, 15, 20, 25, 30, 35

ii) 4, 8, 16, 20, 24, 28.

4. a) Multiples of 3 are 3, 6 , 9 , 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42,45, 48……………..

Multiples of 8 are 8, 16, 24, 32, 40, 48 ………………
Common multiples are 24, 48 ………………
Lowest Common Multiple = 24

b) Multiples of 6 are 6, 12, 18, 24, 30, 36, 42, 48, 54, 60……………………..
Multiples of 9 are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90…………….
Common Multiples are 18, 36, 54………….
LCM = 18

5.a) Factors of 8 are 1, 2, 4 and 8.

Factors of 12 are 1, 2, 3, 4, 6 and 12.
Common factors are 1, 2 and 4.
Highest Common Factor = 4

b) Factors of 16 are 1, 2, 4, 8 and 16.
Factors of 24 are 1, 2, 3, 4, 6, 8, 12 and 24.
Common factors are 1, 2, 4 and 8.
HCF = 8

6. Factors of 12 are 1, 2, 3, 4, 6 and 12.

Factors of 36 are 1,2,3,4,6,9,12,18 and 36.
Factors of 48 are 1, 2, 3,4,6,8,12,16,24 and 48.
Common factors are 1, 2, 3, 4, 6 and 12.
Highest Common Factor = 12

7. The numbers other than 1 whose only factors are 1 and the number itself are called Prime numbers.

The prime numbers between 1 and 20 are 2, 3, 5,7,11, 13, 17, and 19.

8. Numbers having more than two factors are called Composite numbers.

The composite numbers between 1 and 20 are 4, 6, 8, 9, 10, 12, 14, 15, 16, and 18.

9. The term least indicates LCM of these numbers.

So we need to find out the LCM of 4, 7 and 14.
Multiples of 4 are 4, 8, 12, 16, 20, 24, 28, 32, 36, 40………………….
Multiples of 7 are 7, 14, 21, 28, 35, 42, 49, 56…………………..
Multiples of 14 are 14, 28, 42, 56…………………
Common multiples are 28, 56……………..
LCM = 28
Therefore the least number of plants = 28

10. The term maximum indicates HCF of these numbers.

So we need to find out the HCF of 15 and 20.
The factors of 15 are 1, 3, 5 and 15.
The factors of 20 are 1, 2, 4, 5, 10 and 20.
Common factors are 1 and 5.
HCF = 5

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