GRE MTH formulas

  1. How many different committees of 3 people can be formed from a group of 18 people?
    formula:
    • 1) 18/1x17/2x16/3=46/6
    • 2) n!/k!(n-1)
  2. 1) bm/n=__ =__ formulas
    2) bm/n=(nth root√(bm))=(nth root√b)m
    bm/n=(b1/n)m=(b1/m)n
  3. Image Upload 1
    Image Upload 2
  4. 1) divisible by 2 if
    2) divisible by 3 if
    3) divisible by 4 if
    4) 6 
    5) divisible by nine if
    • 1) divide by 2 if: end is divisible by 2
    • 2) last 3 dig add up to multiple of 3
    • 3) last 2 digits are multiple of 4
    • 4) if divisible by both 2 &3
    • 5) 9 if digits add up to a multiple of 9
  5. odd x odd=?
    even x even=?
    • odd x odd=even
    • even x even=even
  6. even+even=
    odd+odd=
    • even+even=even
    • odd+odd=odd
Author
studysuccess
ID
339655
Card Set
GRE MTH formulas
Description
GRE MTH formulas
Updated