Arithmetic

Mixtures & Alligation

Posted on Apr 30, 2011

Lecture Video Part 1 Part 2 Part 3 Part 4

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Indices

Posted on Apr 10, 2011

Every rule and operation relating to Exponents and Roots which can be tested on the GMAT has been listed here. Just make yourself comfortable with the operations and notations. Try to do the problems on your own before you look into the explanations. Enjoy! Exponents Any number to the power 1 is itself. Any nonzero number to the power 0 is 1 Negative integer exponents Exponentiation to a negative integer power can alternatively be seen as repeated division of 1 by the base. For instance, Identities and properties for , and Exponentiation is not commutative: 23 = 8, but 32 = 9. Similarly, exponentiation is not associative either: to the 4th power is or...

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