Fractions and Decimals
The sum of the numerator and denominator of a fraction is 13. If we add 3 and 9 to numerator and denominator respectively, it becomes 2/3. The fraction is:

5/8
3/2
7/6
9/11

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Fractions and Decimals
A has twice as much money as B. They play together and at the end of the first game B wins one-third of A's money from A, what fraction of the sum that B now has, must A win black in the second game,

1/15
1/10
1/5
1/20

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