Number System is an important topic in the Quantitative Aptitude section of the Wipro Aptitude exam. The important topics under this section are Face value, Place value, Various types of numbers, Divisibility rules followed by some formulas.
|Sum of first n natural numbers||n(n+1)/2|
|Sum of square of first n natural numbers||n(n+1)(2n+1)/6|
|Sum of cubes of first n natural numbers||(n(n+1)/2)2|
|Sum of first n odd numbers||n2|
|Sum of first n even numbers||n(n+1)|
|A number divisible by 2||if it ends with 0,2,4,6,8|
|A number divisible by 3||if the sum of its digits is divisible by 3|
|A number divisible by 4||If last two digit divisible by 4|
When you have completed this section go to L.C.M and H.C.F .
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