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Calculate the square of 201.(a) 40401(b) 39393(c) 40426(d) 41042The question was asked during an interview.I'm obligated to ask this question of Finding the Square of a Number in division Squares and Square Roots of Mathematics – Class 8

Answer»

Correct option is (a) 40401

For explanation I would say: In the multiple choice QUESTION student can eliminate three options by mere observation. The student should notice that option 41042 contains 2 in its UNIT place so it cannot be a SQUARE of number ending with 1. Similarly, the other two options 39393 & 40426 ending with 3 and 6 WHEREAS square of numbers ending with 1 have only 1 in its unit place.



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