Question

Only need help on 3b and 4b

Answer 1

3B: LCM = 1540

4B: HCF = 33 and LCM = 990

Explanation:

First step is prime factorization.

2nd write the number as a product of its prime factors

For LCM take all numbers and if it is common take the higher power

For HCF take only the common numbers with the lower power.

See attached.