If nine thousand, nine hundred nine dollars is written as $9,909, how should twelve thousand, twelve hundred twelve dollars be written?
I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?
A container contains 100 eggs. They can be either fresh or rotten. What is sure is the fact that there is at least one fresh egg in that container. If you are asked to pick two eggs randomly from the container, at least one of them will be rotten. Can you calculate how many eggs in that container are fresh?
John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?
What is the next number in this series? 4,12,84,3612....
What's the next in the series? H, Be, F, S, Mn, Kr, In, Gd, Tl, ?
There are five vowels (a, e, i, o, u) in the English language. Can you tell us a word that contains all these vowels?
How much will a 38° angle measure when looked at under a microscope that magnifies ten times?
Find the missing number in the sequence below:
Decode below three cipher riddles: 26 L of the A 7 D of the W 1000 Y in a M
An express train takes 3 seconds to enter the tunnel which is 1 km long. If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?
In the 1920s, people feared that crossword puzzles would contribute to illiteracy.
