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The puzzles solutions 63-64-65



Brain teasers and puzzles

Questions collection

"Find the missing number"

By Panos Kalliantasis



PUZZLE 63






Correct answer is 14

Column AXB-C=D

8X4-16=32-16=16
5X7-18=35-18=17
3X7-7=21-7=14
9X3-13=27-13=14



PUZZLE 64




Correct answer is 8

Column ( A+B+C)/4=D
(9+3+20)/4=32/4=8


PUZZLE 65



Correct answer is 40

Column  A^2-B^2=C
C^2-B^2=D
So
4^2-3^2=16-9=7
7^2-3^2=49-9=40
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