EM-2359

Primes, HCF and LCM

E Math · Secondary 4 · Hard · Primes, HCF and LCM

Two integers,

P

and

Q

, can be written as products of prime factors.

P=2^3\times5^m,\quad Q=2^n\times5^2.

The lowest common multiple (LCM) of

P

and

Q

is

2^4\times5^3

.
What is the value of

m+n

?

7
5
6
8

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