Can you place six X (crosses) in below board without making three in a row in any way ?
How many times do a clock's hands overlap in a day ?
A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?
Sachin bought a car with a strange 5 digit numbered plate.The water image of the number is 78633 more than my car number. All the digits of car number are distinct.
What is the original number on number plate?
There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?
Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?
Complete the missing letters of the given word.
What does the following BrainBat signifies?
How can you leave a room with two legs and return with six legs?
In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.
When a clock is observed, the hour hand is at a minute mark and the minutes hand is six minutes ahead of it.
When the clock is observed again after some time, the hour hand is precisely on a different minute mark and the minute hand is seven minutes ahead of it.
Can you calculate how much time has elapsed between the two observations?
In 2011, people playing Foldit, an online puzzle game about protein folding, resolved the structure of an enzyme that causes an Aids-like disease in monkeys. Researchers had been working on the problem for 13 years. The gamers solved it in three weeks.