This trick can be useful for IBPS and Other Exams as well as SSC,UPSC and other competitive exams....
Find the square of 20
Find the square of 20
4
|
0
|
0
|
Step - 1 :: Square of first digit (22 = 4) then
Multiply with 100 (4*100=400)
| |
+
|
0
|
0
|
Step - 2 :: Multiply 2 with first & second digit (2*0*2=0) then Multiply with 10 (0*10=00)
| |
+
|
0
|
Step - 3 :: Square of second digit (02 = 0)
| ||
4
|
0
|
0
|
Finally we get answer (202 = 400)
|
Find the square of 84
6
|
4
|
0
|
0
|
Step - 1 :: Square of first digit (82 = 64) then
Multiply with 100 (64*100=6400) | |
+
|
6
|
4
|
0
|
Step - 2 :: Multiply 2 with first & second digit (8*4*2=64) then Multiply with 10 (64*10=640)
| |
+
|
1
|
6
|
Step - 3 :: Square of second digit (42 = 16)
| ||
7
|
0
|
5
|
6
|
Finally we get answer (842 = 7056)
|
Find the square of 99
8
|
1
|
0
|
0
|
92 = 81*100 = 8100
| |
+
|
1
|
6
|
2
|
0
|
9*9*2 = 162*10 = 1620
|
+
|
8
|
1
|
92 = 81
| ||
9
|
8
|
0
|
1
|
Finally 992 = 9801
|
It is important to put proper digit in proper position.
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Read also -- Find square of Three digit numbers