A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?
Which Travels Faster? Solve below famous picture riddle:
You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room. How will you decide which one of those is magnet?
What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?
They are three errirs in this question. Can you find them?
In a mathematical quiz, you are asked the following question: Use three 9s in a mathematical expression without dividing or multiplying to form the number one. Can you answer the question?
Look at the below sequence of letters and tell us what the next letter should be: O T T F F S S ?
I shave every day, but my beard stays the same. What am I?
What occurs twice in a week, once in a year but never in a day?
The centre of the third figure is empty. What digit should fit inside?
Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
