Five. We can check the math by adding it together.
20 + 20 + 20 + 20 + 20 = 100
or
20 + 20 = 40 (there's two twenties there)
40 + 20 = 60 (there's your third twenty)
60 + 20 = 80 (fourth twenty)
80 + 20 = 100 (fifth twenty)
Four
7.5
400 ÷ 20 = 20
500 20s.
20, 40, 60, 80, 100, 120 and so on.
100 tens make up 1000
120
4
That's normal. Many girls to not "make out" with a guy until their late teens or early 20s.
113/20 = 33/20 = 100*(33/20)% = 165%
5.4 or 5 with a remainder of 8.
320