square of two digit number tricks
by Francis[ Edit ] 2013-01-22 11:41:10
square of two digit number tricks
Rules
1. Consider 'ab' a two digit number
2. To square individual digit and append it, i.e., (a*a)(b*b) // If square value is single digit add 0 before the digit.
3. Multiply digits with 20, ie., 20*a*b
4. To add these results, ab*ab = (a*a)(b*b) + 20*a*b
Example :
1. Take, 58
2. 5 * 5 = 25, 8 * 8 = 64, ie., 2564
3. 20 * 5 * 8 = 800
4. 2564 + 800 = 3364
therefore, 58*58 = 3364
Its simple tricks for squaring the 2 digit numbers.
