Number Series

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• In a simple series, the difference between two consecutive numbers is constant
  • Example: 27, 24, 21, 18, __
  • [Rule: There is a difference of (-3) between each item. The missing number in this case is 15]
  • Example: 3, 4, 6, 9, 13, 18, __
  • [Rule: Add 1 to the difference between two adjacent items. After the first number add 1, after the second number add 2…etc In this case the missing number is 24]

• Check whether adjacent numbers in the series change based on a logical pattern
  • Example: 2, 4, 12, 48, __
  • [Rule : Multiply the first number by 2, the second number by 3 and so on The missing number is 240]

• See if you can find a rule that involves using two or more basic arithmetic functions (+, -, ÷, x). In the below series, the functions alternate in an orderly fashion
  • Example: 5, 7, 14, 16, 32, 34, __
  • [Rule: Add 2, multiply by 2 , add 2, multiply by 2 etc. the missing item is 68]

• There can also be series, they difference themselves create a series:
  • Example : +2, /3, x4, -5
  • [Rule: The number advance by intervals of 1 and the arithmetic function change in an ordinary sequence here the next Arithmetic function will be 9(3+6=9)]

In a more complex series the differences between numbers may be dynamic rather than fixed, but there still is a clear logical rule. 

More Information: https://en.wikipedia.org/wiki/Series_(mathematics)[/vc_toggle][vc_toggle title=”Instructions to take Aptitude Test” el_id=”1481454372988-cd8f0f96-30f0″]

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