What does below Rebus mean ?

esgg sgeg gegs gsge

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

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

I look at you, you look at me, I raise my right, you raise your left. What am I?

What has many teeth, but cannot bite?

81 x 9 = 801. What must you do to make the this equation true?

John was piloting a plane behind a car but was never able to overtake it. Why?

A donkey is behind another donkey
I'm behind that second donkey
But there is a whole nation behind me

It is a murder you can describe in a word.