Question

a trick to find the square root .. if we have to find the quare root of 35 so the trick is the ones digit is 5 and the square of 5 is '25' .. then multiply 3 with its successor so 3*4 is 12 and the square root of 35 is 1225 .. you can try with any number whos ones place is 5 .. if u have any easy trick plz tell me.. for e.g 15 square root of 5 is '25' and 1*2 is 2 so the ans is 225 .. ​

Answer 1

Answer:

Here is a trick to multiply any two digit no. by 11.

Consider 52×11

The one's place of the answer will be 2 and hundreds place will be 5. The tens place will be 5+2=7

Therefore 11×52 = 572

This can be done with any no. whose sum of digits is less than 9.

Another example to prove it : 11×26 = 286 .