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Numbers and Operations Videos 45 videos

SAT Math 1.3 Numbers and Operations
190 Views

SAT Math 1.3 Numbers and Operations. x and y must be which of the following?

SAT Math 2.4 Numbers and Operations
384 Views

SAT Math 2.4 Numbers and Operations

SAT Math 3.6 Numbers and Operations
208 Views

SAT Math 3.6 Numbers and Operations

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SAT Math 4.1 Numbers and Operations 230 Views


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Description:

SAT Math 4.1 Numbers and Operations

Language:
English Language

Transcript

00:02

Put this in your calculator and shmoop it...

00:05

When an integer is multiplied by itself four times, the result can be...

00:08

I. Positive II. Negative III. Equal to zero

00:11

And here are the potential answers...

00:16

So what is this question asking?

00:18

In short... it's testing our number sense.

00:26

Let's start with a positive number.

00:28

The easiest number to choose is 1.

00:30

Multiply 1 by itself 4 times... and we get 1.

00:33

Now let's try a negative number.

00:35

We're going to be insanely creative and pick... negative 1.

00:38

Multiply it by itself 4 times and we get...

00:42

-1 times -1... that's positive 1. Times -1 is negative 1. Times -1 again is positive 1.

00:52

Now we know that both the positive and negative cases will give us a positive answer.

00:57

We've only got one number left to try. Multiply by 0.

01:01

0 by 0 by 0 by 0... it's just 0

01:04

Never going to be anything different.

01:06

When we tested these three cases, we saw that

01:08

the only possible outcomes were a positive number or 0.

01:12

The answer is B. As in, "Boo."

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