If bob has a prime number of books between 21 and 30 if he takes away 4 books he will be able to place the same number of books on each shelf, how many books does bob have?

The answer would be 26 because the only prime numbers on  from 21 to 30 are 23 and 29 ans 29 - 4 equals 26 and 23 - 4 is 19

1. is 4 and 2. is 3

step-by-step explanation:

so if you look at the first one you see that 1 is to 4 and 2 is to 8 and so on, so you can see for every 1 there is a times 4 so if it were 3 then it would be 3*4 and it is 12

for number 2 it is 3 because 1 is to 3 and 2 is to 6 so for every 1 there is 3 so if it were 3 then there would be 3*3 = 9

step-by-step explanation:

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