kv luchnow
posted by juni
one of two digit of a two digit number is 5 time other digit if we interchange the digit of is two digit number the resulting new number is 6 more then thrice theoriginal number find two digit original two digit number

Steve
clearly the smaller digit is 1, since the larger digit cannot be greater than 9.
The number must be 15
Check:
51 = 6+3*15
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