What percentage of numbers from 1 to 70 have squares that end in the digit 1?
(A) 1 (B) 14 (C) 20 (D) 21
Answer: C
Description:
Clearly, the numbers which have 1 or 9 in the unit's digit, have squares that end in the digit 1. Such numbers from 1 to 70, are totally 14 Numbers.
Required percentage = [(14/70)*100]%
=20%
(A) 1 (B) 14 (C) 20 (D) 21
Answer: C
Description:
Clearly, the numbers which have 1 or 9 in the unit's digit, have squares that end in the digit 1. Such numbers from 1 to 70, are totally 14 Numbers.
Required percentage = [(14/70)*100]%
=20%
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