Question

what percentage of number from 1 to 70have 1or
9 in the unit s digits​

Answer 1

Step-by-step explanation:

20

is the answer

of this question

Answer 2

question

what percentage of number from 1 to 70 have 1 or  9 in the unit s digits​

ANSWER

20% will be the correct answer

Explanation

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 1, 9, 11, 19, 21, 29, 31, 39, 41, 49, 51, 59, 61, 69.

Number of such number =14

Required percentage

(14/70 multiply 100%)

answer is

$20 %$%