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If the least common multiple of two prime numbers x and y is 10, where
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02 Jul 2021, 20:24
1
Theory: If two numbers are co-prime (have no common factor apart from 1) then their LCM = product of those numbers
If the least common multiple of two prime numbers x and y is 10 Simce x and y are prime so they will have only one common factor between them which is 1 => x and y are co-prime numbers So, LCM(x,y) = x*y = 10 So, x and y can be 2 and 5 But we know that x > y => x= 5 and y =2
2x + y = 2*5 + 2 = 12
So, Answer will be D Hope it helps!
To learn more about LCM and GCD watch these videos
gmatclubot
If the least common multiple of two prime numbers x and y is 10, where [#permalink]