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GMAT Math > Basics > Flashcards

Basics Flashcards

1
Q

Convert 3/8 to a decimal

A

.375

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2
Q

Convert 5/8 to a decimal

A

.625

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3
Q

Convert 7/8 to a decimal

A

.875

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4
Q

Convert 1/6 to decimal

A

.16

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5
Q

Convert 5/6 to a decimal

A

.83

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6
Q

Convert 1/9 to decimal

A

.11

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7
Q

Convert .125 to fraction

A

1/8

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8
Q

Convert .375 to fraction

A

3/8

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9
Q

Convert .625 to fraction

A

5/8

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10
Q

Convert .875 to fraction

A

7/8

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11
Q

Convert .16 to fraction

A

1/6

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12
Q

Convert .83 to fraction

A

5/6

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13
Q

Convert .11 to fraction

A

1/9

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14
Q

Formula for circumference (diameter)

A

Pi*diameter

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15
Q

Formula for circumference (radius)

A

2 pi r

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16
Q

Area of a circle

A

Pi r squared

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17
Q

What is a central angle?

A

Degrees between two radii

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18
Q

In a triangle is the sum of any 2 sides greater than the 3rd side?

A

Yes

19
Q

What is the sum of all angles in a triangle?

A

180

20
Q

What side of the triangle is longest?

A

Side in front of the largest angle

21
Q

Describe an isosceles triangle

A

A triangle with 2 equal sides and angles

22
Q

Describe an equilateral triangle

A

All sides are equal and all angles are 60

23
Q

What is the perimeter of a triangle

A

Sum of all sides

24
Q

Area of a triangle

A

1/2 base * height

25
Q

What is the definition of right triangle?

A

One of the angles is 90

26
Q

What is Pythagorean theorem?

A

A^2+b^2=c^2

27
Q

What are the common triplets for triangles?

A 
3-4-5
5-12-13
8-15-17
6-8-10
10-24-26
28
Q

What do adjacent angles in a parallelogram sum to

A

180

29
Q

Opposite sides and angles in a parallelogram are?

A

Equal

30
Q

Area of a parralelogram

A

Area= base height

31
Q

What is the fastest way to compare 2 fractions to see which is bigger?

A

Cross multiply. Bigger one is larger.

32
Q

Can you split a sum in the denominator?

A

No!

33
Q

Basic formula for a line

A

Y=mx*b

M= slope
B= y-intercept (x=0)
34
Q

What are the answer choices for data sufficiency?

A

12TEN

A = 1 = statement 1 only
B = 2 = statement 2 only
c= T = together (both statements)
D = E = either statement
E = N = neither
35
Q

Convert 1/8 to a decimal

A

.125

36
Q

Square root of 2

A

About 1.4

37
Q

Square root of 3

A

About 1.7

38
Q

1/12

A

.083

39
Q

1/11

A

.090909

40
Q

14 squared

A

196

41
Q

13 squared

A

169

42
Q

15 squared

A

225

43
Q

25 squared

A

625

44
Q

(X+y)(x-y)

A

X^2-y^2

GMAT Math (5 decks)

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