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Number Puzzles

Collection of best number puzzles

Number puzzles have specific set of rules, you first has to figure out the pattern being followed and then answer the puzzle according to the pattern.
Number puzzles are a part of many competitive examinations, these also helps you improve your logical thinking and above all these are fun to crack !!!

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Missing number Puzzle X 21 147

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Number Puzzle #173

2 6 18
4 20 100
X 21 147

find X

Check your answer:-

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Answer With Explanation
Answer: X = 3
Solution
in first row next number is a multiplication of 3 and the previous number
second row, next number is a multiplication of 5 and the previous number
in third row 3rd number (147) is a multiplication of 7 and previous number, i.e. 21, thus X*7 = 21 => x = 21/7 = 3

Number Puzzle #171

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Find out the numbers in the boxes

IMG-20170301-WA0005

A + B = 8
+ +
C – D = 6
|| ||
13 8

Check your answer:-
Top Left Box

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Top Right Box
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Bottom Left Box
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Bottom Right Box
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Answer With Explanation
Answer:

3.5 + 4.5 = 8
+ +
9.5 – 3.5 = 6
|| ||
13 8

Explanation:
We can make four equations
A+B = 8
C-D = 6
A+C = 13
B+D = 8

now we have four variables with four equations so it should be easy to solve. let’s solve these four equations

if we add the four equations
A+B+C-D+A+C+B+D = 8 + 6 + 13 + 8
2(A+B) + 2C = 35
2C = 35 – 2*8 —- by replacing A+B
2C = 35 – 16 = 19
C = 9.5

from 2nd Equation C – D = 6
D = C – 6
D = 9.5 – 6
D = 3.5

from 3rd equation
A+C = 13
A = 13 – C
A = 13 – 9.5
A = 3.5

from 4th equation
B + D = 8
B = 8 – D
B = 8 – 3.5
B = 4.5

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