A number consists of 2 digits whose sum is 8.if 18 is added to the number, the digits are interchanged.find the number
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first lets write down numbers that follow "digits whose sum is 8"
17
26
35
44
53
62
71
80
it cant be a number more than 50, because adding 18 wont interchange the digits, leaving us with
17
26
35
44
it cant be 17 or 26 because their reverses are 71 and 62
it is 35 because 35 + 18 = 53
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