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# Gmat

### Gmat formula's

Term | Definition |
---|---|

formulas for averages | average = (sum of items)/(number of items) |

formulas for sums | sum of items = (average)*(number of items) |

distance/rate/time or work/rate/time formulas | d = rt a = rt |

# of combination formulas | n! / [r!(n–r)!] |

Square properties | Area = length2 Perimeter = 4*length |

Rectangle properties | Area = length*width Perimeter = 2(length) + 2(width) |

Circle properties | Area = πr2 Circumference = 2πr |

Parallelogram properties | Area = base*height Perimeter = 2(base) + 2(height) |

Triangle properties | Area = (base*height) / 2 Pythagorean Theorem: a^2+b^2=c^2 |

Trapezoid properties | Area = (1/2)*{(a+b)/h} , where a and b are the length of the parallel sides |

Probability | (Number of favorable outcomes) / (Number of all possible outcomes) |

Interest | Simple Interest = P*r*t Annual Compound Interest = P(1+r)t Compound Interest = P(1 + r/x)^(xt); x = number of times the interest compounds over the year |

Exponent Rules | (x)−n= 1 / x^n x^m*x^n=x^(m+n) x^m / x^n =x^(m−n) (x/y)^n = (x^n) / (y^n) (x^m)^n = x^(m*n) |

Created by:
Hbouknani