Can you identify the hidden rebus in the image below?

What does this rebus puzzle means ?

What is the next number in this series?

4,12,84,3612....

What four weights can be used to balance from 1 to 30 pounds?

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

What begins with T, ends with T, and has T in it?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

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

How can this be possible?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?