Isn’t it fantastic to be able to compute more quickly in everyday situations or on competitive exams? You have to answer more questions in less time on competitive exams. Thus, aspirants are increasingly scurrying behind coaching institutes in search of short cuts. But without conceptual clarity, it is all completely pointless. This is the quick math formula for squaring numbers that ends with 5. Check other quicker math rules here.
Give me any 2 digit number that ends in 5, and I’ll square it in my head! and will give you instant correct result.
452 = 2025
852 = 7225, etc.
There’s a quick way to Squaring Numbers ending with 5 : if the first digit is N and the second digit is 5, then the last 2 digits of the answer will be 25, and the preceding digits will be N*(N+1).
Practice Suggestions:
Once you understand the concept, practice mentally squaring these numbers by practicing multiple examples.
This is quicker math trick 1. Please check other speed math tricks here.
More examples:
Ex 1: (15)2 = 1x(1+1)|52 =2|25 =225
Ex 2: (25)2 = 2x(2+1)|52 =6|25 =625
Ex 3: (85)2 = 8x(9)|52 =72|25 =7225
Ex 4: (115)2 = 11x(12)|52 =132|25=13225
Ex 5: (225)2 = 22x(23)|52 =506|25=50625
General Representation:
(N5)2 = N(N+1)|25
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