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Possible heights as multiples of 7 inches: 28,35,42,49,56,63 and 70. Of these the odd numbers can be discarded as it would be impossible to leave a remainder of 2 after division by 6. 28, 42, 56, 70 On division by 6: 28 leaves 4, 42 leaves 0, 56 leaves 2 and 70 leaves 4, so the answer is 56 inches (ie 4' 8".)

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16y ago

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