Series Questions are one of the most important questions being asked in all the banking exams. ‘Series’ as the name suggests, means questions where a numbers of a similar or related kind come one after the other.

Generally in the exams; one of the two varieties may be asked. The varieties being:

  • Completion Series (What will come next in the series?)
  • Wrong Number Series (Find the wrong term)

Out of the two varieties; mostly the completion series are popular in the exams!

How to attempt?

Frankly Speaking, There is no shortcut that can help us master this topic. Only regular practice can help. Just one suggestion! Stop thinking and Start trying these questions. Slowly an accurate attempt of 3-4 out of 5 easily becomes a reality as we tend to judge the general patterns and apply them to the questions to be able to quickly solve them!

We would be discussing a few common patterns below to help you kick start your practice:

  1. Difference Based: (This is the first thing that must be checked between each term of the series. Sometimes this step itself takes us to the answer or at least gives a hint about the next course of action)

Example: 10, 26, 51? 136, 200

[The differences: 26-10= 16, 51-26= 25….. 200-136= 64 which shows the differences are squares of  4,5,…..,8  respectively. So, in between 62= 36 must be added. Hence, the number would be: 87]

  1. Multiplication Based: (Either the same number is multiplied to each term or numbers in a sequence are multiplied by a number and a number is added or subtracted in each step)

Example: 6, 15, 35, 77 ?  337

[6*2+3= 15, 15*2+5= 35, 35*2+7= 77, 77*2+9= 163, 163*2+11= 337]

  1. Involving Division: (Exactly like multiplication, division should also be checked and tried if the numbers go on decreasing as the series proceeds)

Example: 4320, 720, 144    ?    12, 6, 6

[4320/6= 720, 720/5= 144, 144/4= 36, 36/3= 12, 12/2= 6, 6/6= 1, so the answer is 36]

  1. Mixed Varieties: (This is a mix of the above mentioned varieties)

Example: 816, 812, 404, 1200, 299   ?

[(816 – 4)*1 = 812, (812 – 4)/2 = 404, (404 – 4)*3 = 1200, (1200 – 4)/4 = 299, (299 – 4)*5 = 1475]

For practice exercise on the same; click Here.

All the Best!

Happy Studies 🙂

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