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Wally D.

Size:
102
x^2 = 4

x = +/- 2

Increase Decrease Percentage

(A+B+AB/100)%

What numbers do you test?

-2; -1/2; 1/2; 2

Rates

RT=D

Overlapping Sets

Total = A+B+C - (sum of exactly two group overlap) - 2(overlap of all three) + Neither

Compound interest

Amt = P(1+(r/n)/100)^nt

Amount after n years of interest

Amount n years ago

Divisible by 2

Divisible by 3?

Divisible by 4?

Divisible by 5?

Divisible by 6?

Divisible by 7:

how to know if the # is divisible by 8

Divisible by 9?

Divisible by 10?

Divisible by 11

Divisible by 12?

Divisible by 13

Divisible by 16?

divisible by 17

Consecutive numbers....

Square Any Number Ending in 5

75^{2}

Exponents - Units Digit - 5

Exponents - Units Digit - 6

Exponents - Units Digit - 4

Exponents - Units Digit - 9

Exponents - Units Digit - 2

Exponents - units digit - 3

Exponents - Units Digit - 7

Exponents - Units Digit - 8

percentage change formula

Rates Combined -

A can finish in x;

B can finish in y

Rates Combined

- A can finish in x

= A&B can finish in z

Rates Combined

-3 groups

Travel from XtoY at S mph

Travel from YtoZ at W mph

What is average Speed?

Is |x| > a ??

|x| < a...

|x-a| > b

|x - a| < b

a+x/b+x > a/b if...

a+x/b+x < a/b if...

All prime numbers above 3 are...

Combining Rates - Rates given

average rate

18^2

17^2

16^2

15^2

14^2

13^2

2^5

2^6

2^7

4^3

4^4

7/8

1/9

1/8

1/7

1/6

5/6

17^2

18^2

19^2

21^2

22^2

23^2

6^3

7^3

8^3

9^3

11^3

X & Y consecutive perfect squares

Volume of Cylinder

Compound Interest

Equilateral Triangles

Equal Heigh Triangles

Equal Base Triangles

Angle between two lines

surface area sphere =

Volume of a Sphere

Surface Area of Cone

Volume of a Cone

TOTAL Surface Area of a Cylinder

Volume of a Pyramid

Length of an Arc of a Circle

2/3

16/17

17/18

As numerator and denominator get larger...

Sum of interior angles of polygon

The ratio of the radii of the circumcircle and incircle of an equilateral triangle isTerm

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