# Number Puzzles Questions

Q:

Guess the Number which satisfies the Logic behind  ?

 A) 7 B) 14 C) 10 D) 19

Explanation:

Adding the corresponding numbers in first and last figures gives the corresponding number in the middle figure.

i.e, 4 + 3 = 7

13 + 2 = 15

2 + 4 = 6

9 + 1 = 10

Filed Under: Number Puzzles
Exam Prep: AIEEE , Bank Exams
Job Role: Bank Clerk

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Q:

5 Digits Number?

What 5-digit number has the following features:

If we put the numeral 1 at the beginning, we get a number three times smaller than if we put the numeral 1 at the end of the number.

We can make an equation:

3(100000 + x) = 10x+1

(Why? Well, adding 100000 puts a 1 at the front of a five-digit number, and multiplying by 10 and adding 1 puts a 1 at the end of a number)

Solving this gives:

10x+1 = 3(100000 + x)
10x+1 = 300000 + 3x
10x = 299999 + 3x
7x = 299999
x = 299999/7 = 42857

The answer is 42857 (142857 is three times smaller than 428571).

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Q:

Find the missing number in place of ?

The missing number in the given number puzzle is "78".

Here the logic is the numbers are from 86 - 91 when we read upside down.

Subject: Number Puzzles Exam Prep: Bank Exams
Job Role: Bank Clerk , Bank PO

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Q:

Solve The Logical Number Puzzle?

 A) 72 B) 76 C) 84 D) 90

Explanation:

The logic in the given puzzle is

4 + 4 = 4 * 4+1 = 4 * 5 = 20

5 + 5 = 5 * 5+1 = 5 * 6 = 30

6 + 6 = 6 * 6+1 = 6 * 7 = 42

7 + 7 = 7 * 7+1 = 7 * 8 = 56

Similarly

9 + 9 = 9 * 9+1 = 9 * 10 = 90.