Math Concepts Flashcards

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1
Q

Is zero even or odd? Positive or negative?

A

Even

Neither positive nor negative

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2
Q

Are fractions positive or negative?

A

Neither

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3
Q

Prime #s through 30

A

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

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4
Q

How should you solve 12a+4a?

A

pull out 4… 4(3a+a)

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5
Q

How should you solve 15^12 - 15^11?

A

15^11(15 - 1)

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6
Q

If x^2=16, then x?

A

4 or -4

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7
Q

square root of 1 equals

A

1

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8
Q

square root of 2 equals

A

1.4

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9
Q

square root of 3 equals

A

1.7

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10
Q

square root of 4 equals

A

2

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11
Q

converting mixed numbers

2 2/3 = ?

A

multiply whole number by the denominator and put that number on top of the denominator. add this new fraction to the original fraction
2 2/3… multiple 2 x 3= 6… 6/3…. 6/3 + 2/3 = 8/3

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12
Q

.35 is what percent of 100?

A

35%

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13
Q

formula for percent change

A

(change/original) x 100

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14
Q

Proportions

60 min/$7.20 = 10 min/$X

A

cross multiply

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15
Q

Permutations

A

Order matters

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16
Q

How many ways can you arrange 5 statues?

A

5 x 4 x 3 x2 x 1 =120

17
Q

5 people run a race. how many ways can the 3 medals be given?

A

5 x 4 x 3= 60

18
Q

Combinations

A

Order doesn’t matter

19
Q

There are 5 types of ice cream. How many ways can three flavors be together on a cone?

A

5 x 4 x 3/ 3 x 2 x 1 = 10

numerator is the number of spots filled by the number of options, and the denominator is the factorial of the number of spots

20
Q

Averages Box

A
sum
# of things        average
21
Q

Rate Box

A

distance/amount

time rate

22
Q

45-45-90 triangle sides

A

X - X - Xradical2

23
Q

30-60-90 triangle sides

A

X - Xradical 3 - 2X

24
Q

area of a circle

A

apple pies are too

a= πr^2

25
Q

circumference of a circle

A

cherry pie’s delicious

c=πd

26
Q

quadrant order

A

II I

III IV

27
Q

formula for volume

A

L x W x H

28
Q

volume of a cylinder

A

area of the circle (base) x height

29
Q

probability of A and B

A

prob of A x prob of B

30
Q

probability of A or B

A

prob of A + prob of B

31
Q

groups formula

A

T= G1 + G2 - B + N

Total= Group 1 + Group 2 - Both + Neither