Clean Up!
Amy and her mom are cleaning her room. Amy has 30 toys. Her mom puts toys in a box in seconds, after which Amy takes out . How many minutes will it take them to put all the toys in the box for the first time?
The answer is 14.
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1 solution
The profit every 30 seconds is 1 toy. After 27 * 30 = 810 seconds, there are 27 toys in the box. After 30 more seconds, there are 30 toys in the box for the first time. 810 + 30 = 840
840/60 = 14 minutes