What two things can you never eat for breakfast?

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

Different lights make me strange by changing me into different sizes. What am I?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

Count the Triangle in the figure given below:

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?