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\\October 8, 2025 12:13 PM Bharat Arora P-9 Reader _________________________ Date: ___________________74

Practice time 3G

1. Complete the table:

HCF LCM Product of two numbers

(a) 12 324
(b) 4 252
(c) 72 864

(d) 50 300

2. Find the LCM of two numbers, if their product is 225 and the HCF is 9.

3. The HCF of two numbers is 9 and their LCM is 54. If one of the numbers is 27, find
the other.

4. The product of two numbers is 450. Find their LCM if their HCF is 15.
5. If the LCM of two numbers is 120 and their product is 1800, what will be the HCF?

Logical Thinking
Mental Maths
1. The LCM of two co-prime numbers is their:
( a) product (b) HCF (c) common factor (d) sum

2. The HCF of two co-prime numbers is
( a) 0 (b) 1

( c) the sum of the numbers (d) the product of the numbers

3. If a number is divisible by 2 and 3, then it will also be divisible by
( a) 6 (b) 8 (c) 9 (d) 4

4. Which of the following numbers will complete the given factor tree?

16 × 4

2 × 8 2 × 2

2 × 4

2 × 2

( a) 32 (b) 64 (c) 72 (d) 48
5. How many prime numbers between 1 and 50 have their ones digit as 3?

( a) 3 (b) 4 (c) 5 (d) 2

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