Verified answer

5. " Is 81 a multiple of ______?

a. 8

b. 9

c. 10

d. 11

• 8, 10, and 11 is not a multiple of 81 but 9 is. Which is 9 × 9 = 81.

10. How many prime numbers are there form 1-100?

a. 25

b. 26

c. 27

d. 28

• Prime number is a number that can only be divided by 1 without any remainders or can only be divided by itself. from 1 to 100, the numbers that consists as a prime number are numbers 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, and 97. That is 25 in total.

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