Here’s and example of a SMART MATH problem for ARITHMETIC.
Problem
?
The Usual Method
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Using Rationalization:
=
(Ans: 1)
Estimated Time to arrive at the answer = 30 seconds.
Using Technique
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Since the denominator is , its conjugate is
which is multiplied to it and the numerator
. Since both the terms (
and
) are positive terms, their product too would be positive and there would not be any negative sign. The only option that does not have a negative sign is option ‘1’.
(Ans: 1)
Estimated Time to arrive at the answer = 5 seconds.
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One reply on “[Smart Math] Arithmetic Problem 20”
sir g i think is answer me – sign aayega because denominator is -1