Question

# How to increase numerical calculation ability.

Solution

## Vedic Mathematics: Square of a number ending with 5 (valid for 3-digits as well) ⇒352=(3)(3+1)=12 - first two digits; 52=25 -last two digits.; Hence the answer is 1225. Multiplication of two numbers (2-digit) whose last digit's sum is 10 (valid for 3-digits as well) ⇒43×47=(4)(4+1)=20 -first two digits; 3×7=21-last two digits; Hence the answer is 2021. Square of a number 972 = 97           03 97           03                   ––––––––––––(97−03)    09=94 (first two digits)   09(last two digits) = 9409 Square of a number 1022 = 102           02 102           02                   ––––––––––––(102+02)   04=104 (first two digits)   04(last two digits) = 10404

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