gmattest001 wrote:I got this question on some site
It is known that no more than 7 children will be attending a party.what is the smallest number of cookies that must be brought to the party so that each child receives the same number of cookies.
A. 35
B. 105
C. 180
D. 210
E. 420
Since it's possible that 4 children will attend, the correct answer must be a multiple of 4.
An integer is a multiple of 4 only if its LAST TWO DIGITS form a multiple of 4.
Eliminate A, B and D, since 35, 05, and 10 are not multiples of 4.
Since it's possible that 7 children will attend, the correct answer must be a multiple of 7.
Eliminate C, since 180 is not a multiple of 7.
The correct answer is
E.
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