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Flashcards in GMAT: Basic Computations Deck (6):
1

Squares: 10-20

10=100, 11=121, 12=144, 13=169, 14=196, 15=225, 16=256, 17=289, 18=324, 19=361, 20=400

2

Squares: 21-25

21=441, 22=484, 23=529, 24=576, 25=625

3

Cubes: 1-10

1=1, 2=8, 3=27, 4=64, 5=125, 6=216, 7=343, 8=512, 9=729, 10=100

4

Square roots: √2, √3

2=1.4, 3=1.7, 5=2.2, 7=2.6

5

Powers of 2: from ^-4 to ^10

-4=0.0625, -3=0.125, -2=0.25, -1=0.5, 0=1, 1=2, 2=4, 3=8, 4=16, 5=32, 6=64, 7=128, 8=256, 9=512, 10=1,024

6

Fractions-to-Decimals: 1/50, 1/25, 1/20, 1/15, 1/8, 3/8, 5/8, 1/6, 5/6, 1/5, 1/4, 1/3, 1/2

1/50=0.02, 1/25=0.04, 1/20=0.05, 1/16=0.0625, 1/8=0.125, 3/8=0.375, 5/8=0.625, 1/6=16.67, 5/6=0.833, 1/5=0.2, 1/4=0.25, 1/3=0.33, 1/2=0.5