stonecold wrote:

Ramon wants to cut a rectangular board into identical square pieces. If the board is 18 inches by 30 inches, what is the least number of square pieces he can cut without wasting any of the board?

(A) 4

(B) 6

(C) 9

(D) 12

(E) 15

To find the least number of square pieces Ramon can cut without wasting any of the board, we need the greatest common factor (GCF) of 18 and 30, which is 6. Thus he can cut the board into 6-inch square pieces without wasting any of the board since 6 divides into both 18 and 30 and is the largest number that does so. Therefore, the number of square pieces he can cut is:

(18 x 30)/(6 x 6) = (18/6) x (30/6) = 3 x 5 = 15

Answer: E

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