I was creating Puzzles for Sudoku Mock 21 for Logic Masters India many years back. Some of the puzzles that I created were of the type "Guess the number in the series Sudoku" whose Instructions read as below.

This Sudoku type follows the standard Sudoku rules plus some of the squares will be greyed which can contain numbers from the given series. All but one number in the series will be given. Series follows a particular pattern. One has to find the missing number by following the series pattern and then solve the Sudoku.

During the testing, it was found that it was difficult to find the number in the series. So I decided to drop this puzzle type from the mock test and instead of this, all the numbers in the series will be given. Later I thought of creating the Math Brain Teasers from these sequences. Here are these sequence puzzles in which one has to guess the next number in the series.

In these series puzzles, some number series is given that follow a certain pattern or sequence. A few numbers are missing in these sequences. One has to deduct what is this sequence all about and then solve it for the missing numbers.

Please write down your comments guessing the number which will come next in the series.

1. Which number replaces the question mark in the series? |

2. What is the next number in the series? |

3. What is next in this series? |

4. What comes next in the series? |

5. Number series picture puzzle |

## 11 comments:

Hi Rajesh Series 1 seems to me to be a series about the days of the week. I think the number of letters for the days of the week is given starting from sunday.

Sunday --- 6

Monday --- 6

Tuesday --- 7

Wednesday --- 9

Thursday --- 8

Friday --- 6

Saturday --- 8

So the missing number must be 9 for Wednesday.

Zafer

April 20, 2010Hi again,

Series 2 seems to me to be a series about pi number. It is known that number pi is given as 3,14159265...

And in this series I think the digits forming number pi is given consecutively as 3 1 4 1 5. So I think the next number will be 9.

Zafer

April 20, 2010Hi,

I think Series 5 is about digits 1-9. I think the number of letters in the digit names given consecutively as follows:

1 --- one --- 3

2 --- two --- 3

3 --- three --- 5

4 --- four --- 4

5 --- five --- 4

6 --- six --- 3

7 --- seven --- 5

8 --- eight --- 5

9 --- nine --- 4

So the missing numbers seems to be 5,5,5 in this series.

Zafer

April 20, 2010Hi

Series 3 is a little bit strange. But I have an idea like that:

Each following number starts with the last letter of the previous digit and while searching next digit we go from number to 9 and then from 1 to number. If I apply this rule to the given sequence

2 --- two --- ends with o

1 --- one --- starts with o, ends with e

8 --- eight --- starts with e, ends with t

According to my rule explained above I must put again 2 after 8 since it starts with t. But if the series is decided to be formed by different digits then I must skip 2 and write 3 to the next place since it also starts with t. I have no other idea about this sequence.

Regards,

Zafer

April 20, 2010If we take the Series 4 it would be very easy if the next number is 7:)) But you told it isn't. So there must be anything else about this series. I again think that it is about the names of digits 1-9. I think the digits whose name ends with an e is given consecutively as follows:

1 --- on'e'

3 --- thre'e'

5 --- fiv'e'

9 --- nin'e'

So I think the last digit must be 9 which is missing.

Regards,

Zafer

April 20, 2010If we take the Series 4 it would be very easy if the next number is 7:)) But you told it isn't. So there must be anything else about this series. I again think that it is about the names of digits 1-9. I think the digits whose name ends with an e is given consecutively as follows:

1 --- on'e'

3 --- thre'e'

5 --- fiv'e'

9 --- nin'e'

So I think the last digit must be 9 which is missing.

Regards,

Zafer

April 20, 2010Thanks Zafer,

Most of your answers are right and for Series 5 your logic is quite good but I have something else in mind for Series 5. I will wait for some other people put their guess and logic behind it before I put my logic.

April 20, 2010Monikasaid...I loved to have come across your blog . It's interesting learning experience .

September 25, 2019Rajesh Kumarsaid...Great you solve it right. So many years after posting this #puzzle, I completely forget the logical reasoning used to solve this puzzle. Thanks for your comment, I could recollect the logic used for this picture puzzle.

September 26, 2019Rajesh Kumarsaid...Great, This is one of the oldest puzzle post on this website. Nice to see the visitor coming back and solving these puzzles even after almost of a decade of posting these #puzzles.

September 26, 2019Unknownsaid...One has 3 letters

Three has 5

Five has 4. So 4

Although I like the 'e's solution

November 21, 2020