whats 4+5 if 3+8 is 10

Question

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Answer 1

Something about "3" and "8" produce "10."

 

If this is a Base 9 counting system, the numbers would be:

  0   1   2   3   4   5   6   7   8   9   A   10   . . .              [note:  "A" is just a digit here]

Start at 3 and move 8 places to the right (on the number line) results in 10.

 

There are also other, slightly trickier, answers.  For example.

3 ("Three") has 5 letters and 8 ("eight") has 5 letters.  The total is 10 letters.

   So, 4("four") + 5("five") = 8 

 

Can you think of other "tricks?"