How to find Square number between 90 and 99 / solve in 5 second

Squares number between 90 and 99 this tricks is apply for that is 90, 91, 92, 93, 94, 95, 96, 97, 98, 99.  This tricks is finding square number. This is very short tricks and easy tricks some step is satisfied for this rule
Step 1 :-  substract the number from 100
Step 2 :-  substract the number from step 1
                To original number
Step 3 :- square the result of step 1 ( if the                     results is single digit then put 0                         infront of it)
Step 4 :- place the result first step 2 and next                 step 3

Ex. 92square
Step 1 :- 100 - 92 = 8
Step 2 :- 92 - 8 = 84
Step 3 :- 8 × 8 = 64.       8square = 64
Step 4 :- 84_64
              = 8464

Ex. 97square
Step 1 :- 100 - 97 = 3
Step 2 :- 97 - 3 = 94
Step 3 :- 3 × 3 = 09    OR    3square = 09
              (If the result is single digit then put
               the 0 infront of it)
Step 4 :- 94_ 09
               = 9409

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