In the puzzle of numbers the the question mark is replaced by 8.
What is sum?
Sum is basically the result obtained from adding of numbers. It is also known as summation of numbers.
How to solve puzzle?
We are required to find the number which replaces the question mark. From the figure we can observe that the element in a row or a columns sums to 15.
First row=1+5+6+3=15
First column=1+4+9+1=15
Third row=9+1+2+3=15
Third column=6+1+2+6=15
So the question mark will be replaced by 15-5-1-1=8
Hence in the puzzle of numbers the the question mark is replaced by 8.
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