Basic Math for the GRE General
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| percent formula | part = percent * whole
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| sum of consecutive numbers | sum = average * number of terms
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| median | number placed in a middle of a set
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| average of consecutive numbers | average of smallest + largest. (S + L)/2
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| counting consecutive numbers | B - A + 1 = number of integers
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| mode | number that appears most often
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| range | highest - lowest
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| probability | p = number of favorable outcomes/total number of possible outcomes
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| area of a triangle | A = 1/2 * bh
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| isosceles triangle | two equal angles and sides
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| equilateral triangle | 3 equal 60 angles. 3 equal sides
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| Pythagorean theorem | a^2 + b^2 = c^2
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| special triangle (right) | 3-4-5
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| special triangle (right) | 5-12-13
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| special triangle (30-60-90) | 1-2-sqrt3
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| special triangle (45-45-90) | 1-1-sqrt2
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| area of a square | A = side^2
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| area of a parallelogram | A = bh
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| area of a trapezoid | A = 1/2 h * (b1 + b2)
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| circumference of a circle | C = 2pi*r
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| area of a circle | A = pi * r^2
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| simple interest | interest = (principal) x (interest rate) x (time)
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| compound interest | final balance = principal * ( 1 + (interest rate/C))^((time)(C))
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| length of an arc | arc = (n/360) x 2pi*r
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Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
rlw0217
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