Mathematics
Class 5
HCF and LCM
Q1)
Choose the correct answer.
(1 Mark)
The LCM of 9, 12 is ----.
a)
b)
c)
d)
Q2)
36
9
12
108
Choose the correct answer.
(1 Mark)
The HCF of two consecutive even numbers is ----.
a)
b)
c)
d)
Q3)
2
1
8
0
Choose the correct answer.
(1 Mark)
The greatest number which can divide 16, 20 and 24 is ----.
a)
b)
c)
d)
Q4)
8
4
2
24
Choose the correct answer.
The LCM of two prime numbers is their ----.
a)
b)
c)
d)
Product
Sum
Difference
Quotient
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(1 Mark)
Mathematics
Class 5
Q5)
Choose the correct answer.
(1 Mark)
The HCF of two consecutive odd numbers is ----.
a)
b)
c)
d)
Q6)
0
1
2
3
Choose the correct answer.
(1 Mark)
The HCF of two prime numbers is ----.
a)
b)
c)
d)
1
Greatest among them
Smallest among them
0
Q7)
Two numbers are said to be ---------- or---------- ---------- to each other if they have no
common factor other than 1.
(2 Marks)
Q8)
Fill in the blanks:
(2 Marks)
If a and b are two numbers with HCF H and LCM L then a x b = ---------Q9)
The HCF of any given numbers cannot be ---------- than any of the given numbers.
(1 Mark)
Q10)
Fill in the blanks:
(2 Marks)
The HCF of any given numbers cannot be ---------- than any of the given numbers.
Q11)
Fill in the blanks:
(2 Marks)
The LCM of any given numbers cannot be ---------- than any of the given numbers.
Q12)
Fill in the blanks:
(2 Marks)
HCF of two numbers is always ------ than the LCM.
Q13)
In the 8th standard of a certain school, it is possible to divide the pupils into equal-sized (2 Marks)
sections of either 24 or 30 or 32 pupils with no pupils left over. Find the smallest number
of pupils that makes this possible. How many sections will there be if each section is to
have 30 pupils?
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Mathematics
Class 5
Q14)
Find the prime factors of: 720
(2 Marks)
Q15)
Find HCF of 135 and 108.
(3 Marks)
Q16)
Find the LCM of the following numbers by the method of prime factorisation: 16,24,36
(2 Marks)
Q17)
Find the prime factors of: 438
(2 Marks)
Q18)
Find the smallest number, which when divided by 16, 36 and 40 leaves a remainder of 7 (2 Marks)
in each case.
Q19)
Express the given number in prime factors: 125
Q20)
The HCF and LCM of two numbers are 16 and 672 respectively. If one of the numbers is (2 Marks)
112, find the other number.
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(2 Marks)
Mathematics
Class 5
Answers
Q1)
36
Q2)
2
Q3)
4
Q4)
Product
Q5)
1
Q6)
1
Q7)
Coprime, relatively prime
Q8)
HxL
Q9)
Greater
Q10)
Greater
Q11)
Less
Q12)
Less
Q13)
480 pupils, 16 sections
Q14)
The Prime Factors are: 2 x 2 x 2 x 2 x 3 x 3 x 5
Q15)
27
Q16)
144
Q17)
The Prime Factors are: 2 x 3 x 73
Q18)
727
Q19)
5x5x5
Q20)
96
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