Math tricks

Sum of whole numbers from 1 to N

(n^2+n) /2
Handshake problem

(n^2-n) /2
sum of the first n odd numbers

n^2
sum of the first odd integers 1-n

(n/2)^2
lcm

multiply greatest exponents of numbers in prime factorizations
gcf

multiply least common exponents of prime factorizations of two numbers
types of triangles

Author

t3l3tubie

ID

55236

Card Set

Math tricks

Description

<b> I don't like descriptions </b>

Updated

2010-12-12T16:10:37Z