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Mathematics
Class 4
Factors and Multiples
Q1)
Find the LCM of the given pair.
(1 Mark)
3 and 8
a)
b)
c)
d)
Q2)
Find the LCM of 8, 16.
a)
b)
c)
d)
Q3)
4
8
16
32
(1 Mark)
12
24
48
6
Find the LCM of 6, 8.
a)
b)
c)
d)
(1 Mark)
6
9
30
15
Find the LCM of 12, 16.
a)
b)
c)
d)
Q5)
(1 Mark)
Write the lowest common multiple(LCM) of : 6, 15
a)
b)
c)
d)
Q4)
12
24
8
3
(1 Mark)
12
24
48
6
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Mathematics
Class 4
Q6)
Find the LCM of the given pair.
(1 Mark)
5 and 10
a)
b)
c)
d)
Q7)
5
10
15
20
3 divides 21 exactly. So 3 is a --------------- of 21.
a)
b)
c)
d)
(1 Mark)
Multiple
Factor
Product
Difference
Q8)
Another name for HCF is GCD. GCD stands for ----------------------------.
(2 Marks)
Q9)
Write next three multiples of number. 21
(3 Marks)
Q10)
Add two odd numbers. Is the sum even or odd?
(2 Marks)
Q11)
Write each set on multiples, pick the multiples common to both sets.
(3 Marks)
a. Multiples of 4 (up to 16)
b. Multiples of 6 (up to 18)
Q12)
Write all the factors of each number and pick the highest common factor.
(3 Marks)
36, 42
Q13)
Write out all the factors of each number, then ring the highest common factor.
(3 Marks)
36, 42
Q14)
Find the HCF of 30, 45, 60.
(2 Marks)
Q15)
Write prime factorization of the following numbers.
(2 Marks)
a. 27
b. 30
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Mathematics
Class 4
Q16)
Pick the common multiples in each pair of list below.
(2 Marks)
Multiples of 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40
Multiples of 6 : 6, 12, 18, 24, 30, 36, 42
Q17)
Write down these numbers as the product of two factors.
(3 Marks)
a. 13
b. 2
c. 3
Q18)
Find the G.C.D. of:
(2 Marks)
a. 12, 24, 30
b. 20, 40, 56
Q19)
Write some multiples of the following and circle the least common multiple.
(2 Marks)
a. 4,5
b. 2,5
Q20)
A multiple is a number which can be divided by another number without any
----------------- .
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(2 Marks)
Mathematics
Class 4
Answers
Q1)
24
Q2)
16
Q3)
30
Q4)
48
Q5)
24
Q6)
10
Q7)
Factor
Q8)
Greatest common divisor
Q9)
42, 63, 84
Q10)
Two odd numbers are 5 and 7. Their sum = 12 which is an even number.
Q11)
a. Multiples of 4 = 4, 8, 12, 16
b. Multiples of 8 = 6, 12, 18
Common multiple = 12
Q12)
Factors of 36 = 1, 2, 3, 4, 6, 9, 12, 18, 36
Factors of 42 = 1, 3, 3, 6, 7, 14, 21, 42
HCF = 6
Q13)
Factors of 36 = 1, 2, 3, 4, 6, 9, 12, 18, 36
Factors of 40 = 1, 2, 4, 5, 8, 10, 20, 40
HCF = 4
Q14)
15
Q15)
a. 27 = 3 x 3 x 3
b. 30 = 2 x 3 x 5
Q16)
12, 24, 36
Q17)
a. 13 = 1 x 13
b. 2 = 1 x 2
c. 3 = 1 x 3
Q18)
a. 6
b. 4
Q19)
a. 20
b. 10
Q20)
Remainder
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