Look at the series of numbers given in the picture below and find out how they are connected.

Once you get the pattern, you will be able to find the value of the missing number.

The numbers can be represented in the form of a table below;

5 | 10 | 7 | ||||

2 | 1 | 10 | 6 | 3 | ||

3 | 4 | 5 | ? | 9 | 2 | 1 |

7 | 2 | 15 | 4 | 4 | ||

6 | 7 | 3 |

If you get the correct answer, share it with your friends on WhatsApp, Facebook and other social networking sites.