Common Math Formula's

Question 1

Square root of 2

Answer 1

~1.4

Question 2

Square root of 3

Answer 2

~1.7

Question 3

List the first 5 prime numbers

Answer 3

2,3,5,7,11

*1 is not a prime. 2 is the smallest prime and the only even prime.

Question 4

List the first 10 prime numbers

Answer 4

2-3-5-7-11=$235,711

13-17-19-23-29=$1,317,192,329

Question 5

4 common triangles (length and angles)

Answer 5

3-4-5 triangle
5-12-13 triangle
1-1-√2 triangle (90-45-45)
1-√3-2 (30-60-90) ***you can split equilateral in two of these

Question 6

{1/x}+{1/y}=? (fast shorthand)

Answer 6

{1/x}+{1/y}={x+y}/{xy}

i.e. {1/2}+{1/5}={2+5}/{2*5}=7/10

Question 7

Area and Circumference of a circle

Answer 7

Area=pi{r}^2

Circumference=2pi{r}

Question 8

Arc length of a circle

Answer 8

Arc Length={x/360}2{pi}r

Question 9

how do you simplify a square root

Answer 9

split it into factors with easy square roots

Question 10

Alternative way to write negative exponent

Answer 10

1/(Positive power)

Question 11

Something to the power of 0

Answer 11

anything to the power of zero is ALWAYS 1

Question 12

0 to any power

Answer 12

0 to any power is always 0

Question 13

How do you multiply exponents (with same base)

Answer 13

Add the exponents together over same base

Question 14

How do you divide exponents (with same base)

Answer 14

subtract the exponents over same base

Question 15

What is an exponent to a(nother) power

Answer 15

Multiply the two powers

Question 16

How do you combine/simplify exponents

Answer 16

factor the bottoms so they match

Question 17

Area of a Triangle

Answer 17

(1/2)b*h

Question 18

sum of a consecutive series of integers

Answer 18

[N(N+1)]/2

Question 19

sum of all even integers in a consecutive series

Answer 19

[(First even integer + Last even integer)/2] −1

Question 20

FIVE Common quadratics; ya fucking bish

Answer 20

(a+b)^2 = a^2 +(2ab)+b^2
(a−b)^2 = a^2 −(2ab)+b^2
a^2 −b^2 = (a+b)(a−b)

a^2 +b^2 =
–1–(a−b)^2 +(2ab)
or
–2–(a+b)^2 −2ab