Show the work for it's less than 60 greater than 55 if you add the digits the sum is 13?
Greater than 55.
Is it 56 ? [ 5 + 6 = 11 ]. No.
Is it 57 ? [ 5 + 7 = 12 ]. No.
Is it 58 ? [ 5 + 8 = 13 ]. Yay !
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Another way:
Greater than 55 and less than 60. The number is either 56, 57,
58, or 59.
The first digit has to be '5', and both digits have to add up to
13.
The second digit is [ 13 - 5 = 8 ].
So the number is 58.