Daily Math Challenge

Sharpen your math skills with a new problem every Tuesday to Friday. These daily challenges are perfect for those who enjoy quick, engaging puzzles.

You have a jar that contains blue and red marbles.  The jar has more blue than red marbles. 

You add red marbles until one-third of the marbles in the jar are blue; 
Then you add yellow marbles until one-fifth of the marbles in the jar are blue; 
Then you double the number of blue marbles in the jar; 

What fraction (in decimal form) of the marbles in the jar will be blue?


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