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The largest or greatest among common div...

The largest or greatest among common divisors of two or more integers is called the Greatest Common Divisor (GCD) or Highest Common Factor (H.C.F.)
Two brands of chocolate are available in packs of 24 and 15 respectively. If I need to buy an equal number of chocolates of both kinds, then what is the least number of boxes of each kind I would need to buy?

A

5,6

B

5,8

C

5,4

D

12,14

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