Math Key Facts

Question 1

Hypotneus is 2x length of one side. What are the angles?

Answer 1

30-60-90

Question 2

Product of EVEN number of integers is ( )

Product of ODD number of integers is ( )

Answer 2

Positive

Negative

Question 3

What is the difference between numbers and integers?

Answer 3

Integers are whole numbers

Question 4

How many positive integers less than 100 have a remainder of 3 when divided by 7?

Answer 4

n = mq + r where q is an integer and

0 ≤ r < m

Question 5

list the first 10 prime numbers

Answer 5

2,3,5,7,11,13,17,19,23,29

Question 6

What is the smallest number divisible by both X and Y

Answer 6

LCM = X * Y/ GCF

Question 7

+ & - even odd
even ? ?

odd ? ?

Answer 7

+ & - even odd
even even odd

odd odd even

Question 8

X even odd
even ? ?

odd ? ?

Answer 8

X even odd
even even even

odd even odd

Question 9

b^n(b^m) = ?

Answer 9

b^m+n

Question 10

b^m/b^n =?

Answer 10

b^m-n

Question 11

b^m(c^m) =?

Answer 11

bc^m

Question 12

(-a)^even =? (-a)^odd = ? (+ or -)

Answer 12

Positive , Negative

Question 13

sqrt(a*b) =?

Answer 13

sqrt a * sqrt b

Question 14

Name two ways to reverse an inequality

Answer 14

reciprocals and making both sides negative

Question 15

Denominator of a fraction can never be ( ? )

Answer 15

0

Question 16

A fast way to determine which fraction is greater is to ?

Answer 16

Cross multiply, The bigger numerator is biggest

2/3 > 5/8 bc 8x2 > 3x5

Question 17

n! = ?

Answer 17

product of all of the integers from 1-n

Question 18

When multiplying fractions, simply ____?

Answer 18

multiply numerators and denominators

Question 19

To divide by a fraction, multiply by ____?

Answer 19

reciprocal

Question 20

To increase a number by k% multiply by ____?

To decrease a number by k% multiply by ____?

Answer 20

(1+k%)

1-k%