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28
28
18 is an even number between 12 and 29 with digits whose difference is 7. To answer this question, we start with the last part "difference is 7" and come up with a set of values that meet the need as follows: 18 29 [29 is in the set only if the question is inclusive] Now, there is only one even number in the pre-solution set and that number is 18.
you are the number 48
Suppose the smaller number is x. Then the larger number is 4x. Their difference is 4x - x = 3x So, 3x = 27 which gives x = 9 and then 4x = 4-9 = 36 So the numbers are 9 and 36. (Actually, the pair -9 and -36 are also a solution.)