Question

What percentage of numbers from 1 to 70 have 1 or 9 in the units digit ?

Answer 1

Please mark it as the brainliest

Answer 2

Answer:

Step-by-step explanation:

20% numbers from 1 to 70.

Clearly, the numbers which have 1 or 9 in the unit's digit, have squares that end in the digit 1 or 9. 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

(14/70)*100%= 20%