When monkey rotate the gear, which mark will be hit 1 or 2 ?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Can you solve this tricky maths equation problem by replacing it? mark with the correct symbol?

19834 -----: 187
15921 -----: 153
17561 -----: 139
13734 -----: ???

Below rebus represent famous DiCaprio movie. Can you name it?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?