10
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The square below is missing a number:

Fill in the number

You have four options:

  • 32

  • 4

  • 16

  • 22

Please explain your answer.

HINT:

Something to do with addition.

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  • $\begingroup$ Did you mean to spoiler the hint? $\endgroup$ – jpmc26 Oct 24 '18 at 1:46
14
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The following grid

which uses 16 as the missing number

enter image description here

is magic as adding the letter count spelling the numbers is 21 horizontally, vertically, diagonally.

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  • $\begingroup$ Great thinking as always @Tom. $\endgroup$ – DEEM Oct 23 '18 at 17:41

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