Josh had 19 marbles in his collection. He lost 11 marbles and found 5 new ones. How many marbles does he have now?
First, we need to find how many marbles Josh had in his collection originally. He had 19 marbles, so we can say that the original number of marbles is 19. 

Next, we need to find how many marbles Josh lost. He lost 11 marbles, so we can say that the number of marbles he lost is 11. 

Now, we need to find how many marbles Josh found. He found 5 new marbles, so we can say that the number of marbles he found is 5. 

Finally, we need to find how many marbles Josh has now. To do this, we need to take away the number of marbles he lost from the original number of marbles, and then add the number of marbles he found. This gives us 19 - 11 + 5, which is 13. 

Therefore the answer (numeric) is: 

13