ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Numbers and Operations Videos 64 videos
SAT Math 1.4 Numbers and Operations. Solve the equation.
SAT Math 1.3 Numbers and Operations. x and y must be which of the following?
SAT Math 4.1 Numbers and Operations 230 Views
Share It!
Description:
SAT Math 4.1 Numbers and Operations
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?
Full Transcript
- 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."
Related Videos
SAT Math 2.1 Geometry and Measurement. What is the measure of angle z in terms of x and y?
In 2014, the unemployment rate of one county in California was 7%. In another county, the unemployment rate was 11%. Which of the following express...
Angela is making cookies for a bake sale. She expects each batch of her cookies to sell for $40. It costs her $10 to make one batch of cookies, and...