help with homework !?

1: i am a number double me then double me again the result is 48 wat number am i?

2: i am a number divide me by 2 multiply the quotient by 20 divide that answer by you get 25 wat number am i?

3: i am a number take on third of me add that to one half of 10 the result is 10 wat number am i?

4:i am a number subtract me from 99 subtract me again keep on until you have subtracted me 8 times the result is 19 wat number am i?

5:i am a number divide me by 8 then multiply the result by one half of 8 you will get 16 wat number am i?

6: i am a number multiply me by subtract 25 from the product the result is 50 wat number am i?

7:i am a number divide me by 6 add 25 to the result you will get me wat number am i?