Quantitative Flashcards

1
Q

What are the prime numbers from 1-40?

A

2,3,5,7,11,13,17,19,23,29,31,37

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2
Q

What are the rules of numbers divisible by 3?

A

If the digits in the number add up to a multiple of 3.

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3
Q

What are the rules of numbers divisible by 4?

A

If the final 2 digits would be themselves be divisible by 4. 2544 and 44 are both divisible by 4.

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4
Q

What are the rules of numbers divisible by 6?

A

If it is divisible by both 2 and 3

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5
Q

What are the rules of numbers divisible by 7?

A

Use long division to check it.

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6
Q

What are the rules of numbers divisible by 8?

A

If the final 3 digits by themselves would be divisible by 8. 2216 is divisible by 8 because 216 is divisible by 8.

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7
Q

What are the rules of numbers divisible by 9?

A

If the digits within the number add up to a multiple of 9. 495 is divisible because 4+5+9 = 18

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8
Q

What are the exponents of 2?

A

2, 4, 8,16,32,64,128,256,512,1024

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9
Q

What are the exponents of 3?

A

3,9,27,81,243,729

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10
Q

What are the exponents of 5?

A

5,25,125,625,3125

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11
Q

What are the exponents of 6?

A

6,36,216,1296

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12
Q

What are the exponents of 7?

A

7,49,343,2401

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13
Q

12x12=

A

144

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14
Q

13x13

A

169

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15
Q

14x14

A

196

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16
Q

15x15

A

225

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17
Q

20x20

A

400

18
Q

25x25

A

625

19
Q

30x30

A

900

20
Q

40x40

A

1600

21
Q

50x50

A

2500

22
Q

100x100

A

10,000

23
Q

What is the formula for the Sum of the Numbers?

A

(Average of the numbers)(number of numbers)=

24
Q

What is the formula for the Average of the numbers?

A

=(biggest+smallest)/2

25
Q

What is the formula for the Number of numbers?

A

=((biggest-smallest)/spacing)+1

26
Q

What does x^2-25 factor out to?

A

(X+5)(x-5)

27
Q

What is the square root of 2?

A

About 1.4

28
Q

What is the square root of 3?

A

About 1.7

29
Q

What is the square root of 5?

A

About 2.2

30
Q

What is the percent formula?

A

(Is/of)=(percent/100)

31
Q

What is the formula for percent change?

A

((New-old)/old)x100

32
Q

What is 1/2 as a decimal?

A

0.5

33
Q

What is 1/3 as a decimal?

A

1.3333333…

34
Q

What is 2/3 as a decimal?

A

0.66666666…

35
Q

What is 1/6 as a decimal?

A

1.66666…

36
Q

What is 5/6 as a decimal?

A

0.83333…

37
Q

What is 1/8 as a decimal?

A

0.125

38
Q

What is 3/8 as a decimal?

A

0.375

39
Q

What is 5/8 as a decimal?

A

0.625

40
Q

What is 7/8 as a decimal?

A

0.875