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Re: If k is an integer, what is the smallest possible value of k [#permalink]
14 May 2018, 00:47

One should also remember that the exponents of prime factors are even.

or we can solve the problem by taking the prime factorization of 1040 , when we do so we notice the factors of 13 and 5 are not even rather they are only 1 each..

hence we choose the option he because when we multiply 1040 by 65 13 and 5 factors make the exponents of 1040*65 even

hence option is E is correct.

greprepclubot

Re: If k is an integer, what is the smallest possible value of k
[#permalink]
14 May 2018, 00:47