Latest Sasken Aptitude Question SOLUTION: Q. How many 2 digit number satisfy the following. that last digit of the square of the 2 digit number is 8 Option a) None b) 1 c) 2 d) 3 e) More than three

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Q. How many 2 digit number satisfy the following. that last digit of the square of the 2 digit number is 8

Option
a) None
b) 1
c) 2
d) 3
e) More than three

Asked In Sasken (12 years ago)

Solved Pargat Pal Singh Read Solution (2)

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Read Solution (2) :

Pargat Pal Singh  (12 years ago)

A. none

as no perfect square is having last digit as 8.

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Mithun Kumar Kesari  (9 years ago)

a) None

_ _1^2=1 (last digit)
_ _2^2=4 (last digit)
_ _3^2=9 (last digit)
_ _4^2=6 (last digit)
_ _5^2=5 (last digit)
_ _6^2=6 (last digit)
_ _7^2=9 (last digit)
_ _8^2=4 (last digit)
_ _9^2=1 (last digit)
_ _0^2=0 (last digit)

we found that last digit of a square no. is 1,4,5,6,9, 0.
hence there is no number such that the last digit of square of that number is 8.

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