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Can a batch of identical cookies be split evenly between Laurel and Jean without leftovers and without breaking a cookie?
1) If the batch of cookies were split among Laurel, Jean, and Marc, there would be one cookie left over.
2) If Peter eats three of the cookies before they are split, there will be no leftovers when the cookies are split evenly between Laurel and Jean.
The OA is B.
I have an approach to solving this DS question,
Let no. of cookies be x.
It is clear from the stem that if the cookies were to be divided equally between Laurel & Jean, x needs to be even.
1) x = 3p + 1; if p is even, x will be odd and vice versa, hence this is INSUFFICIENT.
2) x = 2q + 3; x will always be odd, hence cookies cannot be divided equally between Laurel & Jean. SUFFICIENT.
If someone has another approach, please write it. That's would be great. Thanks!
1) If the batch of cookies were split among Laurel, Jean, and Marc, there would be one cookie left over.
2) If Peter eats three of the cookies before they are split, there will be no leftovers when the cookies are split evenly between Laurel and Jean.
The OA is B.
I have an approach to solving this DS question,
Let no. of cookies be x.
It is clear from the stem that if the cookies were to be divided equally between Laurel & Jean, x needs to be even.
1) x = 3p + 1; if p is even, x will be odd and vice versa, hence this is INSUFFICIENT.
2) x = 2q + 3; x will always be odd, hence cookies cannot be divided equally between Laurel & Jean. SUFFICIENT.
If someone has another approach, please write it. That's would be great. Thanks!
