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GMAT Study cards

Divisibility Rules of 3 Sum of the digits can be divided by 3
Divisibility Rules of 4 if the number formed by the last two digits is divisible by 4
Divisibility Rules of 6 if a number is divisible by 2 and 3
0/2 0
2/0 undefined
.2 1/5
.66 2/3
.33 1/3
.4 2/5
.6 3/5
.8 4/5
Compound Interest Interest rate is divided by the number of times compounded throughout the year
Average/Mean total sum of items/total number of items
Median ordered #s in which the middle number is picked
Mode number appearing most frequently
Range smallest number subtracted from the largest
2^6 x 2^2 2^8
2^6 / 2^2 2^4
(2^6)^2 2^12
12^1 12
12^0 1
r x t d
(x+2)(x+5) x^2+7x+10
(x+y)^2 x^2+2xy+y^2
(x+y)(x-y) x^2-y^2
Created by: lfiddler