A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?
Nine marbles are arranged in the image below. Can you slide two marbles to form a square?
How many bananas can you eat if your stomach is empty?
If, 6 / 7 = 2 3 / 9 = 7 8 / 2 = 6 Then 4 / 5 = ?
I taste better than I can smell. Who am I?
I have eight fingers and two thumbs but I do not live. What Am I?
Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?
Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?
What Does this text mean: important=important
Which is the smallest number that you can write using all the vowels exactly once?
What are the 50th, 63rd and 100th numbers in the sequence below? 4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.