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Missing numbers in series

June 23, 2013 by puzzler 3 Comments

 

missing numbers in the series 4, 10, 22, 46, ?, ?, 382

missing numbers in the series 4, 10, 22, 46, ?, ?, 382


Find the missing numbers in this series: 4, 10, 22, 46, _____, _____, 382
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Missing numbers in the series are: 94 and 190.

How ?
Every number in the series is following this pattern
Next number = (previous number)*2 + 2;

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0.999… = 1 #55

June 7, 2013 by puzzler Leave a Comment

0.9999999…….. = 1, true or false?

0.999.... = 1, Right or Wrong?

0.999…. = 1, Right or Wrong?


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Its Right, yes 0.999 followed by infinite 9’s is equal to 1.

Proof 1 for 0.999… = 1

x = 0.999...
10x = 9.999...
10x - x = 9.999... - 0.999...
9x = 9
x = 1

Proof 2 for 0.999… = 1

1/3 = 0.333...
3x(1/3) = 3x(0.333...) = 0.999...
1 = 0.999...

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What is the next number in sequence? #54

June 4, 2013 by puzzler 1 Comment

 

what is the next number in sequence

what is the next number in sequence

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Next number in the series will be 3263442.
How?
every number in the sequence= (previous number)x(previous number +1)
thus next number in this sequence will be 1806*1807 = 3263442.

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Get number 28 # 53

May 30, 2013 by puzzler Leave a Comment

How you can get number 28 by using following numbers and operators

Numbers: 1, 5, 7 and 8.
Operators: +, -, * and /
You can use ( ) brackets as well.

Rules:-

  1. You can use each number only once.
  2. You can not use 1 and 5 as 15.
  3. You have to use all of the above number mentioned (1,5,7 and 8)


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There are multiple solutions
Solution 1: (8-5+1)*7 = 28
Solution 2: 7*5 – 8 + 1 = 28

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10 digit number #52

May 28, 2013 by puzzler 1 Comment

Find the 10 digit number satisfying below conditions

Its first digit is the number of occurrence of 0’s in the number.
Second digit is the number of occurrence of 1’s in the number.
Third digit is the number of occurrence of 2’s in the number.
4th digit is the number of occurrence of 3’s in the number.
and so on up to 10th digit(which is number of occurrence of 9’s in the number).

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Only 10 digit number satisfying these conditions is 6210001000.

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Next number in series? #51

May 27, 2013 by puzzler 1 Comment

 

what is next number in this series? 1, 2, 3, 5, 8, ???

what is next number in this series? 1, 2, 3, 5, 8, ???
Hint: this is a classic and very important series.

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Next number in the series will be 13.
How?
every number in this series is sum of previous two numbers, thus the next number should be 5 + 8 = 13.
This classic and very important series is called Fibonacci series.

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What is the next number in series? #50

May 26, 2013 by puzzler 2 Comments

 

what is the next number in series

23, 5, 12, 3, 15, 13, ???
Hint: A way to say “HELLO”

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Next number in series will be 5.
How?
its WELCOME, where each letter is replaced by its sequence number in the english alphabets.

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What is name of father? #49

May 25, 2013 by puzzler 5 Comments

 

What is the Father's name

Mother’s name is
Mrs. Sixty Two
Son’s name is
FIFTY TWO
Daughter’s name is
FORTY TWO
What is the name of the father?

IF
Mother’s name is
Mrs. SIXTY TWO

Son’s name is
FIFTY TWO

Daughter’s name is
FORTY TWO

What is the name of the father?

Check your answer:-

Tried enough already?
See ExplanationHide Explanation
As mother’s name is Mrs. Sixty two so father’s name should be Sixty two.

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Number Puzzle #48

May 20, 2013 by puzzler 2 Comments

What is the missing letter?

6 4 4 N 4 1 L 7 5 U 6 10 ? 1 14 2

6 4 4 N
4 1 L 7
5 U 6 10
? 1 14 2

Check your answer:-

Tried enough already?
See ExplanationHide Explanation
Answer is Q
How?
The letter in the box is the nth alphabet where n is the sum of other three numbers.

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Missing number in series #45

May 2, 2013 by puzzler 3 Comments

What is the missing number in this series

1,16,36,__,81,100,144

Tried enough already?
See SolutionHide Solution
Series is the square of non prime numbers, 12, 42, 62, 82, 92, 102, 122. these are square in sequence excluding the prime numbers 2,3,5,7 and 11. Thus the missing number in series should be 82=64.

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