Mr. Youn has 30 times as many pencils as Jack. The whole school has 200 times as many pencils as Jack. If Jack has 2 pencils, how many pencils do the following have?
Jack has 2 pencils, therefore Mr. Youn has 30x2=60 pencils, and the school has 200x2=400 pencils.
If Jack has 2 pencils, and Mr. Youn has 30 times, that would mean you have to do 30 times 2, right? And then, the whole school has 200 times as many as Jack, so in order to find out how much pencils the whole school has, you must do 30 times 200.
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To find out how many pencils Mr. Youn and the whole school have, we need to use the information given.
Given that Jack has 2 pencils, we can calculate how many pencils Mr. Youn has by multiplying Jack's number of pencils by 30: 2 pencils * 30 = 60 pencils.
To find out how many pencils the whole school has, we multiply Jack's number of pencils by 200: 2 pencils * 200 = 400 pencils.
So, Mr. Youn has 60 pencils and the whole school has 400 pencils.