Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

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

If eleven plus two equals one, what does nine plus five equal?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

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?