In the class of 24 students, half are doing silent reading, and a third are playing board games. The rest are catching up on homework. How many students are catching up on homework?
24/2=<<24/2=12>>12 students are doing silent reading.
24/3=<<24/3=8>>8 students are playing board games.
So 12+8=<<12+8=20>>20 students are accounted for.
Then 24-20=<<24-20=4>>4 students are catching up on homework.
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Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
You are solving math problems. Here are some examples of how to solve the task:

Hilary is shucking corn from ears that grew on her farm. She gets four ears of corn per stalk, and she has 108 stalks growing. Half the ears of corn have 500 kernels of corn and the other half have 100 more. How many kernels of corn does Hilary have to shuck?She has 108 * 4 = <<108*4=432>>432 ears of corn to shuck.
She gets 500 kernels of corn from half the ears and 500 + 100 = <<500+100=600>>600 kernels from the other half.
Half the number of ears of corn is 432 / 2 = <<432/2=216>>216 ears.
Thus, Hilary has 216 * 500 + 216 * 600 = 108000 + 129600 = <<216*500+216*600=237600>>237600 kernels to shuck.
#### 237600[END]

Frank and Bill have $42 and they bought 3 large pizzas with the money. Each pizza cost $11 and Frank paid for all three pizzas. Frank gave the rest of his money to Bill. If Bill had $30 already, how much money does Bill have now?Frank spent 11*3 = <<11*3=33>>33 dollars on pizza.
Frank gives 42-33 = <<42-33=9>>9 dollars to Bill.
Bill now has 30+9 = <<30+9=39>>39 dollars.
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Now, solve this next question in the style of the above examples:

In the class of 24 students, half are doing silent reading, and a third are playing board games. The rest are catching up on homework. How many students are catching up on homework?

### Response:
24/2=<<24/2=12>>12 students are doing silent reading.
24/3=<<24/3=8>>8 students are playing board games.
So 12+8=<<12+8=20>>20 students are accounted for.
Then 24-20=<<24-20=4>>4 students are catching up on homework.
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