Assessment Exam undefined

The H.C.F. of two numbers is 5 and their L.C.M. is 150. If one of the numbers is 25, then the other is:
A. 30 B. 28
C. 24 D. 20

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Assessment Other Question

What is the lowest common multiple of 12, 36 and 20?
A. 160 B. 220
C. 120 D. 180
504 can be expressed as a product of primes as
A. 2 × 2 × 3 × 3 × 7 × 7 B. 2 × 3 × 3 × 3 × 7 × 7
C. 2 × 3 × 3 × 3 × 3 × 7 D. 2 × 2 × 2 × 3 × 3 × 7