## Find answer of logical math question / puzzle / riddle:

We have been given four equations.

16 = 62
55 = 56
28 = 83
21 = ?

It is a logical riddle which means hard math is not involved. We can simply solve such questions using our mind. The solution of this question is simple. Use your mind to solve it & if you are unable to find a correct answer or are not sure about your solution then you can scroll down to see the solution & explanation.

Answer logical math puzzle / riddle

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See the pattern of this question. We have been given two sides:

Left Hand Side = Right Hand Side
But values on both sides are different hence it is a logical puzzle.

First Equation:
16 = 62

Now if you look at L.H.S. which is equal to 16
Reverse order of L.H.S. = 61
Hence 62 is equal to R.H.S.

Now using the same pattern in Equation 2 & see whether our pattern is correct or wrong:

55 = 56
L.H.S. = 55
Reverse order of L.H.S. = 55

Hence it is equal to R.H.S.

Now again checking our pattern in third equation:

28 = 83
L.H.S. = 28
Reverse order = 82

It is equal to R.H.S.

Now solving final equation:
21 = ?
L.H.S. = 21
Reverse order = 12