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jmc

number theory junior

Problem

The smallest positive integer greater than 1 that leaves a remainder of 1 when divided by 4, 5, and 6 lies between which of the following pairs of numbers?
(A)
(B)
(C)
(D)
Solution
Since the remainder is the same for all numbers, then we will only need to find the lowest common multiple of the three given numbers, and add the given remainder. The is . Since , that is in the range of
Final answer
D