HCF, LCM & Factorisation

HCF and LCM Worksheet-1

Mark against the correct answer:

1. 252 can be expressed as a product of primes as :

(a) 2 × 2 × 3 × 3 × 7                    (b) 2 × 2 × 2 × 3 × 7

(c) 3 × 3 × 3 × 3 × 7                    (d) 2 × 3 × 3 × 3 × 7

2. Which of the following has most number of divisors ?

(a) 99                  (b) 101                (c) 176                (d) 182

HCF and LCM Worksheet-2

Mark against the correct answer:

1. The L.C.M. of is :

(a) 36                  (b)                 (c)             (d)

HCF and LCM Worksheet-3

Mark against the correct answer:

1. The L.C.M. of two numbers is 495 and their H.C.F. is 5. If the sum of the numbers is 10, then their difference is :

(a) 10                  (b) 46                 (c) 70                  (d) 90

2. The product of the L.C.M. and H.C.F. of two numbers is 24. The difference of two numbers is 2. Find the numbers.

(a) 2 and 4         (b) 6 and 4        (c) 8 and 6         (d) 8 and 10