Math tricks

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  1. Sum of whole numbers from 1 to N
    (n^2+n) /2
  2. Handshake problem
    (n^2-n) /2
  3. sum of the first n odd numbers
    n^2
  4. sum of the first odd integers 1-n
    (n/2)^2
  5. lcm
    multiply greatest exponents of numbers in prime factorizations
  6. gcf
    multiply least common exponents of prime factorizations of two numbers
  7. types of triangles

Card Set Information

Author:
t3l3tubie
ID:
55236
Filename:
Math tricks
Updated:
2010-12-12 16:10:37
Tags:
math
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Description:
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