Find the missing number in the square

Question

Hopefully this is not a repost, as I couldn't find an existing one...yet:

What is the missing number? enter image description here

dennisdeems · Accepted Answer · 2015-07-17 22:11:36Z

4

The answer is 27, substract the number formed by the digits on the second row from the number formed by the digits on the first row and divide by 2.

dennisdeems

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answered Jul 17 '15 at 21:41

Puzzle Prime

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1

$\begingroup$ The ol multiply A by 10 and add to B trick... What do they call that again? oh right base 10... gets me everytime. $\endgroup$ – Going hamateur Jul 17 '15 at 21:43
$\begingroup$ How does that apply to the 3 and 7? $\endgroup$ – Maxqueue Jul 17 '15 at 21:54
$\begingroup$ 64-24=2*20, 34-28=2*3, 50-36=2*7. $\endgroup$ – Puzzle Prime Jul 17 '15 at 21:55
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$\begingroup$ oh i see what threw me off was that (6-2) = 4 (4-4)=0 when concantenated = 40 /2 = 20. Same applies for the 27. Thanks for clarification $\endgroup$ – Maxqueue Jul 17 '15 at 21:57
$\begingroup$ what a short-lived question lol, nicely done Artur ;) $\endgroup$ – Alex Jul 17 '15 at 21:59

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