Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?
The first box has two white balls. The second box has two black balls. The third box has a white and a black ball. Boxes are labeled but all labels are wrong! You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball. How many such operations are necessary to correctly label the boxes?
This is a classy optical illusion puzzle. What more you can find except bricks in the image below?
Identify the next two numbers in this series. 101, 112, 131, 415, 161, 718, ???, ???
My sock drawer has 26 blue socks, 13 pink socks, 33 green socks, and 12 red socks, how many socks would I have to pull out in the dark to be sure I had a matching pair?
Find the next number in the sequence 1, 2, 6, 21, 88, __?
You can see three almost identical images below. Can you spot the odd one out from them?
If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten. How is this possible?
This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?
Can you find the missing letter in the sequence? S - T - I - L - ? - T - F - Y - C
Write the next letter in this sequence. O, T, T, F, F, S, S, E, __ **Hint: It is a Number Series Puzzle
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
