PuzzlersWorld.com

All Puzzles Solved Unsolved

If 11 + 11 = 8, 12 + 12 = 12

by 7 Comments

Number Puzzle # 63

If 11 + 11 = 8, 12 + 12 = 12, 13 + 13 = 16 14 + 14 = 16 Then 16 + 16 = ?

If
11 + 11 = 8,
12 + 12 = 12,
13 + 13 = 16
14 + 14 = 20
Then
16 + 16 = ?


Check your answer:-

Tried enough already?
See Explanation
Answer is 28
How?
Right side number is equal to the sum of the digits on left side multiplied by 2
for ex.
11 + 11 => (1+1+1+1)*2
Thus
16 + 16 => (1+6+1+6)*2 = 28.

10,20,74,100 what will be the next number

by Leave a Comment

Number Puzzle #62

10,20,74,100. What will be the next number in the series?

next number 10, 20, 74, 100, ?

next number 10, 20, 74, 100, ?

Check your answer:-

Tried enough already?
Click here to See Solution
The Next number in the series is 202.

Explanation:-
Natural number starts with 1,2,3,4,5,6……….
This series is derived by adding 2 consecutive odd Natural Numbers and even natural numbers

first 2 odd natural numbers are 1 and 3 = i.e. square of 1 + square of 3 = gives 10 ( first number)
first 2 even natural numbers are 2 and 4 = Square of 2 + square of 4 = gives 20 ( second number)
second 2 odd natural numbers are 5 and 7 = gives 74 (third number)
second 2 even natural numbers are 6 and 8 = gives 100 ( fourth number)
third 2 odd natural numbers are 9 and 11 which gives 202 ( 5 th number)

Answered by : Vishal Vinchankar

If 9999=4, 8888=8

by 3 Comments

Number Puzzle #61

number puzzle #61

If 9999=4
8888=8
1816=3
1212=0
Then 1919=?


Check your answer:-

Tried enough already?
See Explanation
Answer is 2.
How?
If you observe carefully, right side number is equal to total number of circles in the left side numbers. thus the answer to 1919 should be 2.

Take 1000 and add 40 to it

by 1 Comment

Tricky math question!
Note: This must be done in your head only. Do NOT use paper and pencil or a calculator. Try it.

Take 1000 and add 40 to it. Now add another 1000. Now add 30. Add another 1000. Now add 20. Now add another 1000. Now add 10. What is the total?


Click here to see answer

Did you get 5000? The correct answer is actually 4100.
Don’t believe it? Check with your calculator!

Number puzzle from month name

by 2 Comments

Here is a list showing the month and a number for each

January 73
February 83
March 51
April 52
May 31
June 42
July 41
August 63

Decipher the logic and find the number for September.

Click here to see Answers

Answer is 93.
How?
If you observe first number is the number of letters and the second number is the number of vowels present in the month spelling. Thus for september it should be 93.

Guess the car number

by 8 Comments

There is a 4 digit card number,
4th digit is double of 1st digit,
2nd n 3rd digits are same,
And last digits together are double of first two digits
Can you guess the car number?


Check your answer:-

Tried enough already?
Click here to see Explanation
lets assume first digit is x, then the 4th digit will be 2x.
also assume 2nd and 3rd digits are y.
then from => last two digits are double of first two digits, we can say
y(2x) = 2*(xy)

We can rewrite is as 10y + 2x = 20x + 2 y
8y = 18x
4y = 9x; => y/x = 9/4
as x and y are integers y => 9, x => 4

thus the car number is 4998

Number Puzzle #59

by 1 Comment

Find the answer in the image below

number puzzle 59

number puzzle 59


Check your answer:-

Tried enough already?
See Explanation
Answer is 14.
How?
Actually its nothing but number of squares in the image, in the first image there are 5 squares and in the second there are 14 squares. thus the answer will be 14.

How many children, ladies and gents are there?

by 2 Comments

One family of 20 members have 20 chapatis to eat, finally

  1. Every child gets 1/2 chapati
  2. Every Lady in the house gets 2 chapatis
  3. And every gentleman gets 3 chapatis to eat.

How many Child, Ladies and Gents are there in the family?

See Answers

There are two possible answers:
Answer1: Number of children = 14, Ladies= 5 and Gents = 1
Answer2: Number od children = 16, Ladies = 0 and Gents = 4.
How?
We can form the mathematical equations and solve them, lets assume number of children = x, ladies = y and gents = z.

Then we can form these two equations

  1. x + y + z = 20(Total number of people in family)
  2. x/2 + 2y + 3z = 20 (Total number of chapati’s)

Now we can solve above two equations as below

x/2 + 2(y+z) + z = 20
x/2 + 2(20 -x) + z = 20 (replaced y+z from first equation)
40 + z -3x/2 = 20
3x/2 = 20 +z
as z > 0 => 3x/2 > 20, x = 14, 16, 18...

We can see that y becomes negative for any value of x greater than or equal to 18,thus x = 14 and 16 are two possible values. we can get the corresponding values of y and z as well.

Number Puzzle #58

by 4 Comments

IF 1= 5; 2 = 10; 3= 30, Then 4 = ?

IF 1 = 5 2 = 10 3 = 30 Then 4 = ??

IF 1 = 5
2 = 10
3 = 30
Then 4 = ??


Check your answer:-

Tried enough already?
See Explanation
Answer is 120.
How?
If we observe
10 = 2×5
30 = 3×10
So every next result = multiplication of first number and previous result. thus the answer to above number puzzle should be 4×30 = 120.

Social

privacy policy