Question

Roberts number is between 20 and 32. The sum of digits is 10. What is his number

Answer 1

For the digits to have a sum of 10, it has to be one of these:

19, 28, 37, 46, 55, 64, 73, 82, or 91 and the only one in between 20-32 in this case is 28

Answer 2

28

Explanation: