Which Number Riddle

Which Number Riddle Solution - 25 October

Which number should replace the question mark in the picture below ?



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Solution26

14 = 1^2 + 2^2 + 3^2
21 = 4^2 + 1^2 + 2^2
29 = 4^2 + 3^2 + 2^2
26 = 3^2 + 4^2 + 1^2
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