What percentage of numbers from 1 to 70 have squares that end in the digit 1? `1` b. `14` c. `20` d. `21`

What percentage of the numbers from 1 to 50 have squares that end in the digit 1? (a) 1 (b) 5 (c) 10 (d) 11

What percentage of numbers from 1 to 80 have 1 or 9 in the units digit?

The percentage of itegers from 1 through 100 whose square end with the digit 1 is x% , and the percentage of integers from 1 through 200 whose squares end with the digit 1 is y%. Which one of the following is true?

The product of all integers from 1 to 100 will have the following number of zeros at the end: (a)20 (b)21 (c)19 (d)24

The total number not more than 20 digits that are formed by usingd the digits 0, 1, 2, 3, and 4 is a. 5^(20) b. 5^(20)-1 c. 5^(20)+1 d. none of these

The total number not more than 20 digits that are formed by usingd the digits 0, 1, 2, 3, and 4 is a. 5^(20) b. 5^(20)-1 c. 5^(20)+1 d. none of these

The number with n digits has either ______ digits in its square. a. 2n+1 b. 2n-1 c. n^2 d. 2n

What is the sum of the squares of the digits from 1 to 9?105quad (b) 260quad (c) 285 (d) 385

The total number not more than 20 digits that are formed by usingd the digits 0,1,2,3, and 4 is a.5^(20) b.5^(20)-1 c.5^(20)+1 d.none of these