GMAT Exam

Bowl contains marbles. If 1/4 of the marbles were removed, the bowl would be filled to 1/2 of its capacity. If 100 marbles were added,the bowl would be full. How many marbles are in bowl?

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GMAT Other Question

There are 5 doors to a lecture room. Two are red and the others are green.In how many ways can a lecturer enter the room and leave the room from different colored doors?
(A)3(B)6(C)12(D)24(E)18
Two different numbers when divided by the same divisor left remainders of 11 and 21 respectively. When the numbers' sum was divided by the same divisor, the remainder was 4. What was the divisor?