Vedic / Quicker / Shortcut Math ⇒ Topic : Square any number from(20-29)
Easy way to mentally square any number from 20 to 29Step 1:First add the given number and the unit's digit.
Step 2:Double the result obtained in step 1.
Step 3:Square the unit's digit of the number given in question and place it next to the result obtained in step 2.
Example 1:Find the square of 22 in 5 seconds
Step 1:22 + 2=24
Now put the result obtained in step 3 in step 2,we getAns:484
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