Jan enters a double dutch competition. After training she doubles her speed which used to be 70 skips per minute. How many skips does she do in 5 minutes? Let's think first. Chain of thought:
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She does 70 * 2 = 140 skips a minute. So he does 140 * 5 = 700 skips in the 5 minutes.
Therefore, the answer is 700.
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