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6 9 7

73 67 71

9 19 6 13 8 ?

Find the Number which will replace ?

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It may be easier to see this way....

   6		  9		   7
73 67 71
9 19 6 13 8 ?[/code]

[spoiler=looks like]15[/spoiler]

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Posted · Report post

6 9 7

73 67 71

9 19 6 13 8 ?

Find the Number which will replace ?

These triangles are made by multiplying the top and left numbers, then adding the right number to get the middle number.

So 7*8+?=71.

? = 15

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