Squaring a 2 digit number ending in 5
1.Choose a 2-digit number ending in 5.
2.Multiply the first digit by the next consecutive number.
3.The product is the first two digits: XX
4.The last part of the answer is always
25:_ _2 5.
Example:
1.If the number is 35. 3 x 4 = 12 (first digit times next number). 12______
2.The last part of the answer is always 25:____2 5.
3.So 35 x 35 = 1225.
See the pattern?
1.For 65 x 65, 6 x 7 = 42 (first digit times next number): 4 2_____.
2.The last part of the answer is always 25:____2 5.
3.So 65 x 65 = 4225.
Notes
Vedic Maths - Notes
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