CAHSEE Math 6.1 Number Sense

Number Sense: Drill Set 6, Problem 1. The root being squared must be between which two numbers?

AlgebraSquare Roots
CAHSEE MathNumber Sense
LanguageEnglish Language
Number SenseSquare roots

Transcript

00:24

So... this is really testing our ability to recognize perfect squares.

00:29

It should be pretty obvious with all the double zeroes in here,

00:32

we may very well have a couple of them in our hands.

00:35

900 is 30 squared and 1600 is 40 squared.

00:39

But if you DIDN'T recognize them, we could have brute-forced the answer by just

00:43

taking each answer choice one by one until we find one that works.

00:48

9 squared is 81, which is below 900

00:51

Answer B gets us to the promised land.

00:54

If we were to keep going and square the 90 listed in choice C, we are already well above the minimum.

01:00

And since D is even higher, it's an easy reject.

01:02

Done. Answer B it is.