Home > Math Shortcuts > Brain Trigger #24 – Sample Number puzzle question

Brain Trigger #24 – Sample Number puzzle question

Here in this section we will discuss some question and answer on Number puzzle which are very common in competitive exams. These types of Number puzzle questions will help you to prepare for your exam. Try to solve the question mention below using your skills on math. You can also apply your learning skills of Shortcut Tricks.

Here in this website we try to bring together all types of shortcut methods on Number puzzle for every topic. Now just apply shortcut tricks of Number puzzle to solve these Number puzzle problems. Without applying any shortcut tricks, you can also solve these questions.

Here we will discuss a question on Number puzzle. All you need to do is to read the question very carefully and try to solve it by yourself. We will provide the answer of this question below. If you try this question and get a answer then check your answer with our answer. If you don’t know how to do it then check the solution below.

Every page contains a single question on Number puzzle and its answer with explanations. If you want to check other questions then click on Next/Previous link below.

Let’s begin the question and answer session. Today’s question is:


What should be the number in the question mark ?

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To know the solution of this problem please scroll down below. Take as much time as you want to get the answer of this question. But always try to solve it as quickly as you can.



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Here starts the solution of the above problem. If you already solve the problem then please check your answer with our solution. Well Done if you got an correct answer of the question, but if you are not able to answer it correctly then don’t worry. Solution with explanation of the following question is provided below.

You can solve in this way ……….

from up to down number each number would be double and subtruct 1 and then next number again double and subtruct 2 then 3 etc.
4 + 4 = 8 -1 = 7
7 + 7 = 14 – 2 = 12
12 + 12 = 24 – 3 = 21
21 + 21 = 4 2 – 4 = 38
38 + 38 = 76 – 5 = 71



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One comment

  1. loknath manna says:

    1st diff b/w 7-4=3 & 3+3=6-1=5;
    so 7+5=12 & 5+5=10-1=9;
    so 12+9=21 & 9+9=18-1=17;
    so 21+17=38 % 17=17=34-1=33;
    so 38+33=71
    i think like this…

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