What does does this rebus picture means ?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

A pet show was happening in my locality. I went down along with my kids. In that show, I noticed that all except two of the entries were cats. All except two were dogs and all except two were Monkeys.

Can you find out how many of each animals were present in that pet show?

People put me on the table and cut me but do not eat me. What am I?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Can you count the number of triangles in the picture below?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

Complete the table series riddle by finding the number that can replace "??".