Square of 123456
(1)square 6 = 36
(ii) multiply and double 5,6= 2(5*6)
(iii) multiply 4*6,double then square 5 and add = 2(4*6)+ sqaure of 5
(iv) multiply 3 and 6, double AND multiply 4 and 5, double=2(3*6)+ 2(4*5)
(v) multiply 2,6 double,,, then 3,5 , double,,,,,square 4 } add all
(vi) multiply 1,6 double,,,,, multiply 2,5 double....., multiply 3,4 double..add all
(vii)multiply 5,1 double,,,,,multiply 2,4 double,,,,,,square 3... add all
(viii) multiply 4,1 double,,,, multiply 2,3 double,,,,,,add all
(ix) multiply 3,1 double, ,,, square 2 add all
(x) multiply 2,1 double
(xi)square 1
NOW
1.36 ii.60 iii.73.iv. 76 v. 70 vi. 56 vii. 35 viii. 20 ix. 10 x. 4 xi.1
Start writing 6 of 36 from unit place, and keeping aside 3.then add to 60, 63, keeping aside 6 ..............
Answer is
15241383936
To learn many more techniques in speed maths
We recommend
(1)square 6 = 36
(ii) multiply and double 5,6= 2(5*6)
(iii) multiply 4*6,double then square 5 and add = 2(4*6)+ sqaure of 5
(iv) multiply 3 and 6, double AND multiply 4 and 5, double=2(3*6)+ 2(4*5)
(v) multiply 2,6 double,,, then 3,5 , double,,,,,square 4 } add all
(vi) multiply 1,6 double,,,,, multiply 2,5 double....., multiply 3,4 double..add all
(vii)multiply 5,1 double,,,,,multiply 2,4 double,,,,,,square 3... add all
(viii) multiply 4,1 double,,,, multiply 2,3 double,,,,,,add all
(ix) multiply 3,1 double, ,,, square 2 add all
(x) multiply 2,1 double
(xi)square 1
NOW
1.36 ii.60 iii.73.iv. 76 v. 70 vi. 56 vii. 35 viii. 20 ix. 10 x. 4 xi.1
Start writing 6 of 36 from unit place, and keeping aside 3.then add to 60, 63, keeping aside 6 ..............
Answer is
15241383936
To learn many more techniques in speed maths
We recommend
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