Which is heavier: a ton of bricks or a ton of feathers?

Solve this riddle by finding the odd one out from the rest.

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

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

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

With the help clues provided in the image, can you find the 5 digit key?

What is at the end of a rainbow?

Use the digits from 1 up to 9 and make 100.

Follow the rules.
=> Each digit should be used only once.
=> You can only use addition.
=> For making a number, two single digits can be combined (for example, 4 and 2 can be combined to form 42 or 24)
=> A fraction can also be made by combining the two single digits (for example, 4 and 2 can be combined to form 4/2 or 2/4)

Question: how can we do this?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?