I make two people out of one. What am I?

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

Can you solve the below rebus?

No matter how little or how much you use me, you change me every month. What am I?

If 1+9+8=1, what is 2+8+9?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

I am an odd number. Take away a letter and I become even. What number am I?

What English word has three consecutive double letters?

You can see it everyday, But cannot touch it at will. What is it?