Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

What is the centre of gravity?

A game is being played where eight players can last for thirty-five minutes. Six substitutes alternate with each player in this game. Thus, all players are on the pitch for the same amount of time including the substitutes.

For how long is each player on the pitch?

Forwards I am heavy, backward I am not. What am I?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

The more you take me, the more you leave me behind.
Who Am I?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

What does this simple rebus mean?

The husband and wife were jogging in the morning. To match every two steps of the husband, the wife required three steps. If Both of them start with the here right foot. After how many steps do their left foot be together?