Guess Number

[Guest]

What is the number?

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[Guest]

7
For each column subtract the square root of the bottom number from the top number to get the middle number.

Hope this helped,
R. Baber.

[leesajohnson]

7 is the answer to the given question.
For the first column: 16= 4*4 so the first number - square root of the last number
5-4= 1
For the second column: 49= 7*7 same process
11-7= 4
For the third column: 121= 11*11
18-11= 7
so we get the middle number of the third column is 7