Here is mathematical trick to find square of a number whose last digit is 5. Shortcut tricks are very helpful for fast calculations in competitive exams as time allotted
is too less for lengthy calculations. So shortcut tricks helps us to
solve questions is very less time hence improving chances of getting good score and higher rank in merit.
Find Square of A Number Ending With 5
Follow steps below :
- Multiply digits before 5 with next higher digit.
- Now write down the result and place/ append 25 as last two digits.
- This is your final answer.
Follow examples below to understand it better:
Eg. 1:
(25)2
=> 2*3 = 6 (Multiply 2 with next higher digit)
=> 625 (Append 25 in the last)
(25)2 = 625
Eg. 2:
(65)2
=> 6*7 = 42 (Multiply 6 with next higher digit)
=> 4225 (Append 25 in the last)
(65)2 = 4225
Try it yourself:
- (125)2 =
- (15)2 =
- (55)2 =
- (85)2 =
- (45)2 =
Mathematics is all about practice. Practice more and more problems of this type to improve your speed.
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