Sarah and Michael are jumping rope. Sarah jumps every 3 seconds while Michael jumps every 4 seconds. If they start jumping at the same time, after how many seconds will they jump together again?
12 seconds
Two buses leave the station at the same time. One bus returns every 15 minutes and the other every 20 minutes. How many minutes until they meet again at the station?
60 minutes
Sarah has 24 blue balloons and 36 red balloons. She wants to make equal groups with all balloons, using the same number of each color in each group. What is the largest number of groups she can make?
12 groups
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