10.3
500 20s.
Four
150.
one hundred2,000 / 20 = 100
120
4
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)
There are infinitely many possibilities: Two easy ones are: 0 + 150 and 1 * 150
Itβs 15 times
That's normal. Many girls to not "make out" with a guy until their late teens or early 20s.
400 ÷ 20 = 20