marcodonzelli wrote:

If x and y represent digits of a two digit number divisible by 3, is the two digit number less than 50?

Some explanation of choice 2 please

1. Sum of the digits is a multiple of 18

Sum of the digits has to be 18 / 36 / 54 etc...

The smallest # whose sum of digits is 18 is 99. Hence # > 50. Sufficient.

2. Product of the digits is a multiple of 9

Prod of digits can be 9, 18, 27, 36.....

9 - 19 or 91

18 - 36 or 63 or 29 or 92

27 - 39 or 93

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.

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So insuff..

I would answer A.

Whats OA ?

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