Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to create the closest possible sum to 100.
Hint
Can you give me 3 numbers that add up to 100 (any number could be repeated)? How can we use this to fill in the boxes using each digit only once?
Answer
There are multiple solutions – one example is 59 + 24 + 17 = 100.
Source: Graham Fletcher