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Mathematical Reasoning Videos 30 videos

CAHSEE Math 1.1 Mathematical Reasoning
228 Views

CAHSEE Mathematical Reasoning: Drill 1, Problem 1. Based on this information, which of the following can be determined?

CAHSEE Math 1.2 Mathematical Reasoning
185 Views

CAHSEE Math Mathematical Reasoning: Drill Set 1, Problem 2. Which of the following should be the most appropriate first step in solving the equation?

CAHSEE Math 1.3 Mathematical Reasoning
183 Views

CAHSEE Math Mathematical Reasoning: Drill 1 Problem 3. Which of the following is the correct order of steps?

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CAHSEE Math 1.4 Mathematical Reasoning 178 Views


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Description:

Mathematical Reasoning Drill 1 Problem 4. What other information is needed?

Language:
English Language

Transcript

00:03

Let’s see if you can shmoop what we’re layin' down...

00:07

In a math class, the teacher gives the students a pop quiz every week.

00:11

We know… she must have been commissioned by the devil.

00:17

The number of problems on each quiz is always the same.

00:20

If each problem on the quiz is always worth five points and takes an average of three minutes to finish,

00:26

what other information is needed to find the number of problems on each weekly quiz?

00:31

And here are the potential answers...

00:36

OK, so this question is all about just reading and deducing the broader, factual story here…Sherlock.

00:42

By glancing at options C and D, we can see that we really just need to test the validity

00:46

of A and B to get our answer…

00:48

A suggests that we’d need the total number of points on each weekly quiz.

00:52

That makes sense. Say we know there are 50 points possible. We already know that each

00:57

problem is worth 5… 50 divided by 5 is 10, and we’d know there are just 10 problems.

01:03

A gets through to the lightning round.

01:07

What about B?

01:08

Here, it’s suggested that all we’d need is the amount of time allowed to complete the quiz.

01:13

Hey, what do you know… that works, too. If we’re told the class has an hour, we

01:17

can take 60 minutes divided by 3 minutes per problem to get… 20 problems.

01:22

B is also through to the lightning round.

01:26

Unfortunately for our two ultra-competitive contestants… there is no single winner here.

01:31

Both A and B are correct, so we’ve got ourselves a tie.

01:34

And we’ll want to go with choice C for our final answer.

01:37

As in C, “Class… NOT dismissed…”

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