Squaring a 2 digit number beginning with 9
1. Take a 2-digit number beginning with 9.
2. Subtract it from 100.
3. Subtract the difference from the original number: this is the first part of the answer.
4. Square the difference: this is the last part of the answer.
Example:-
1. If the number is 96, subtract: 100 - 96 = 4. 96 - 4 = 92.
2. The first part of the answer is 92_____.
3. Take the first difference (4) and square it: 4 x 4 = 16.
4. The last part of the answer is_____16.
5. So 96 x 96 = 9216.
See the pattern?
1. For 98 x 98, subtract: 100 - 98 = 2. 98 - 2 = 96.
2. The first part of the answer is 96_____.
3. Take the first difference (2) and square it: 2 x 2 = 4.
4. The last part of the answer is_____04.
5. So 98 x 98 = 9604.
Notes
Vedic Maths - Notes
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