It is always ahead of me yet I can never see it. What is it?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Can you fill the blank with the correct number?

6 30 870 756030 _____

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Look at the picture and find out which square is not linked with any of the other squares.

While preparing the table for dinner, wife came up with an idea to tease his mathematician husband. She asked her husband to pick nine toothpicks and make ten without breaking any toothpick.

The husband was also smart and did it within seconds. How ?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

Take one out and scratch my head, I am now black but once was red. What am I?

There is something which is always coming but never arrives?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?