Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.
Can you write down eight eights so that they add up to one thousand?
There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?
If a wheel has 54 spokes, how many spaces are there between the spokes?
What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?
How many pluses should we put between the digits of 987654321 to get a total of 99, and where?
Look at this sequence from top to bottom. What is the next number in the sequence? 1 11 21 1211 111221 312211
If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?
Who always enjoys poor health?
You knock a Table over in the library, and suddenly 20 eyes are looking at you.
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
