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GRE Math Facts

Helpful things to memorize for the GRE Quantitative Reasoning Coding the answers for this one was tricky, read the hints for formatting suggestions. Use "pi" or "3.14" for π, SRT for square root symbol, 2 can be used in place of 2nd exponent
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Last updated: November 16, 2017
First submittedNovember 16, 2017
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Hint
Answer
1/8
(decimal equiv)
0.125
1/6
 
0.16
1/5
 
0.20
1/4
 
0.25
1/3
 
0.33
√2
 
1.40
√3
 
1.70
e
 
2.70
π
 
3.14
11²
=
121
12²
=
144
13²
=
169
 
Hint
Answer
14²
=
196
15²
=
225
16²
=
256
17²
=
289
18²
=
324
19²
=
361
(x+y)²
= _² + ___ + _²
x²+2xy+y²
(x-y)(x+y)
=
x²-y²
Area of a circle
 
πr²
Circumference of a circle
 
πd
Length of diagonal line bisecting 1x1 square (as if dividing square into two triangles)
use "SRT" for square root symbol in answer
√2
Height of equilateral 1x1 triangle (line drawn straight down center)
use "SRT" for square root symbol in answer
(√3) ÷ 2
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