GMAT Quantitative Reasoning Practice Test 1

Question : 44 of 100

Marks: +1, -0

If the least common multiple of two prime numbers

x

and

y

is 10 , where

x>y

, then the value of

2 x+y

Solution:

The only prime numbers that satisfy this condition are 2 and 5 . Since

x>y, x=5

and

y=2

. Therefore, by substitution,

2(5)+2=10+2=12

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