20
55 of them.
An iPhone 5S.
21 5s
Rubidium has one 5s electron.
5, 15, 25, 35, 45, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 65, 75, 85, 95. By counting them, there are twenty 5s between 1 and 100.Actually...if by "between" the questioner intended to exclude the number 100, then there are only 19 5s "between" 1 and 100.
16.
7
500 = 5 x 100 500 - 475 = 25 = 5 x 5 100 - 5 = 95
The values are 5/10 and 5/100 respectively
Exactly 33 of them
The answer would be 7,000