Help with math questions!!!!!!!!!

__please tell me the answers for the questions below!!!!!!(Nerd)(Nerd)(Nerd)(Nerd)__

1. Five apples and six bananas together cost as much as 8 bananas and 9 pears. one apple cost as much as 2 pears for the same price as 1 pear, how many bananas could be bought?

A: 1

B: 2

C: 3

D: 4

E: 6

2. Let R = 8 x 9 x 7 x 13 and S = 4 x 6 x 11 x 49. The greatest common factor of R and S is

F: 12

G: 24

H: 56

J: 168

K: 504

3. In the following sequence of eight numbers, each number has one more "1" than the number before it:

2,12,112,1112,....,11111112

what is the hundreds digit in the sum of all eight of these numbers

F: 0

G : 6

H: 7

J: 8

K: 9

4.Mario, John and Boris are teenagers and the sum of their ages now is 49. the sum of their ages 8 years from now will be F, and the sum of their ages 10 years was P. The value of F-P is.

A: 54

B: 18

H:17

J:6

K:2