Divide the face of the clock into three parts with two lines so that the sum of the numbers in the three parts are equal.

Expert Answers

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The sum of the numbers on the clock would be 78 (1 + 2 + 3 . . + 12).  So 78/3 = 26 so you would have to find the number combinations that would give you 26.  The only three combinations that work for a clock face are:

11 + 12 + 1 + 2

10 + 9 + 3 + 4

8 + 7 + 6 + 5

that means you will draw one line below the 11 and across to below the 2 and the second line would be above the 8 and across to below the 4. 

Seeing is believing . . .draw and label a clock face then add the two lines! 

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