John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?
On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday. Is this even possible? How can it be?
Can you spot the hidden girl in the picture below?
There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?
Eight of us go fourth, not back, to protect our king from an attack. What are we?
I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.
What goes up but never comes down?
Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?
Find the next number in the sequence 1, 2, 6, 21, 88, __?
A father's child, a mother's child, yet no one's son. Who am I?
1 dollar = 100 cent = 10 cent x 10 cent = 1/10 dollar x 1/10 dollar = 1/100 dollar = 1 cent => 1 dollar = 1 cent solve this tricky problem?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
