Natural and place value
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65
This sum can be any of 14 (from the number 95 or 59), 12 (from the number 84 or 48), 10 (from the number 73 or 37), 8 (from the number 62 or 26), 6 (from the number 51 or 15), or 4 (from the number 40).
A) If a number has two digits, then the sum of its digits is less than the value of the original two-digit number.
39