This week's GeekDad Puzzle of the Week is about perfect and almost perfect number pairs. Perfect numbers are numbers that equal the sum of their divisors. For example, the number 6 can be divided ...
Number bonds are pairs of numbers that add up to a target number. Number bonds to 10 can be described in different ways. You can say '6 and 4 make 10', or '3 and 7 more equal 10', or even that 'double ...
Here is last week's puzzle, as originally posted: Perfect numbers are numbers that equal the sum of their divisors. For example, the number 6 can be divided evenly by 1, 2, and 3, and 6 = 1 + 2 + 3.
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