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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