Cheat Sheet - Download as DOC by tamir13

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									                                                 Cheat Sheet
                                  (Make sure to draw your rulers and protractors)
                   (Also write down ABCD and ABCDE before hand to save time during the test)

3:4:5                                     45:45:90                                30:60:90
6 : 8 : 10                                Longest side: multiply by 2             Longest side is twice the shortest
9 : 12 : 15                                                                       side
                                          Shortest side: divide by 2
5 : 12 : 13                                                                       Middle side is the shortest side
8 : 15 : 17                                                                       times 3


    2              2
x + 2xy + y = (x + y)
                              2                    Even + Even =                            Even  Even =
    2              2          2
                                                   Odd + Odd =                              Odd  Odd =
x – 2xy + y = (x – y)                              Even + Odd =                             Even  Odd =
    2     2
x –y           = (x – y)(x + y)


       An integer is divisible by 2 if its units digit is divisible by 2
       An integer is divisible by 3 if the sum of its digits is divisible by 3.
       An integer is divisible by 4 if its last two digits form a number divisible by 4.
       An integer is divisible by 5 if its units digit is either 0 or 5.
       An integer is divisible by 6 if it is divisible by both 2 and 3.
       An integer is divisible by 9 if the sum of its digits is divisible by 9.
       An integer is divisible by 10 if its units digit is 0.

    2  1 .4                                p1q1  p2q2  ptotal q1  q2            V  L W  H
    3  1 .7
                                                                                      SA  2LW   2LH   2WH 
                                            d  ( x2  x1 ) 2  ( y 2  y1 ) 2
I = prt
                                                                                      V = hr²
                                            A=½bh
D=rt
1 1       1                                                                                 4
                                              2                                     V=      r³
t1 t 2 t total                              A= s 3                                          3
                                                  4
 w1t1  wt
       2 2                                                                           S = 180(n – 2)
other other                                 A = r²
                                                                                       x   Length
difference                                  C = 2r                                       
           100                                                                       360 Circum
 original
                                            A = bh



          Verbal               5th               10th              15th             20th             25th
                            22min left      18                13              8                  4

         Math                  5th               10th              15th             20th             23th
                            33min left      26                18              11                 7

								
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