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CAHSEE Math 5.3 Mathematical Reasoning 231 Views


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Description:

Mathematical Reasoning Drill 5 Problem 3. Which of the following could be the integer mentioned?

Language:
English Language

Transcript

00:03

Here’s an unshmoopy question for a rainy day…

00:06

An integer between 70 and 110 exists such that it is a multiple of 2, 3, and 5.

00:13

Which of the following could be this number?

00:15

And here are the options…

00:19

Right from the get go, we can eliminate option A, because last time we checked…

00:23

…60 was not between 70 and 110. Option B can also be eliminated because 75

00:29

is odd, which means it can’t be a multiple of 2.

00:31

Yay, elementary school math!

00:34

The next easiest step would be to eliminate C...

00:36

…because the ones digit of 84 isn’t 5 or 0, which means it’s not a multiple of 5.

00:42

And there you go!

00:43

We only have one option left. Sure enough, 90 is a multiple of 2, 3 and 5.

00:48

So our answer is D.

00:49

As in, “Divides evenly.”

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