Easy way to mentally square any number from 41 to 49.

• Step 1) Subtract the number from 50.
• Step 2) Subtract the result of first step from 25.
• Step 3) Square the result from first step (append zero if result is single digit).
• Step 4) Place result from step 3 next to the result of second step.

Example, 1) (43)^2
         Step 1):- 50 - 43 = 7
         Step 2):- 25 - 7 = 18
         Step 3):- 7 * 7 = 49
         Step 4):- Join result from step second & step third to get result.
                     = 1849
So We get, (43)^2 = 1849.

               2) (46)^2
         Step 1):- 50 - 46 = 4
         Step 2):- 25 - 4 = 21
         Step 3):- 4 * 4 = 16
         Step 4):- Join result from step second & step third to get result.
                     = 2116
So We get, (46)^2 = 2116.

               3) (44)^2
         Step 1):- 50 - 44 = 6
         Step 2):- 25 - 6 = 19
         Step 3):- 6 * 6 = 36
         Step 4):- Join result from step second & step third to get result.
                     = 1936
So We get, (44)^2 = 1936.

😊 Good Luck👍