## Mental Ability – Competitive Exam Preparation – Number Series by adding fixed number – NTSE, NCO, NSO, IMO and other Competitive Exams

The sequence or series of numbers created by adding fixed number :

**5 , 7 , 9 , 11 , 13 etc**– Number sequence obtained by adding fixed number 2**6, 11, 16, 21, 26 etc**– Number sequence obtained by adding fixed number 5

Similarly number sequence can be obtained by adding two fixed numbers alternatively or by adding two fixed numbers after repeated series. Example below:

**5, 7, 10,12, 15, 17, 20 etc **– This number sequence is formed by adding 2 and 3 alternatively

**5, 6, 7, 9, 11, 13, 16, 19, 22 etc** – This number sequence is formed by adding fixed number 1 , 2 and 3 after regular interval i.e after 3 numbers

Below is some questions to practise this. Please leave your answers in comment box on this page or write to us on abhyas.practise@gmail.com.

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Complete the sequence by adding fixed numbers

- 1234, 1236, 1238, _____, 1242, 1244, _____
- 1400, 1500, ______ , 1700, 1800, 1900, ______
- 3, 9, 15, _____, 27, 33, 39, ______, 51
- 8, 17, _____, 35, 44, _____, 62
- 10, 15, 25, 35, 40, 45, 55, 65, _____ , 75, 85, ______
- 6, 9, 15, 21, 24, 27, 33, ______ , 42, ______
- 3, 5, 7, 10, 13, 16, 18, 20, _____, 25, ______, 31
- 10, 20, 50, _____, 90, 100, 130, 160, _____, 180, 210, 240
- 1000, 1200, 1600,________, 2200, 2400, 2800, 3200
- 86, 96, 116, 136, 166, ______, 236, 276, 326, 376

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