2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?
Why is Saturday stronger than Monday?
Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?
Identify the hidden meaning behind this picture?
A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?
There are three identical triplets sisters. Demi is the oldest of them all and she always speaks the truth. Diana is the next one who is a liar always. Drew, the youngest of them all speaks both truth and lies randomly.
On a rainy day, a family friend Victor visited them. Since there were starkly identical, he was not able to recognize them. Thus to clarify, he asked one question to each one of them.
He started with the one standing on the left and asked, 'Which sister is in the middle of you three?' She answered, 'That's Demi.'
Then, he asked the one standing in the middle, 'What is your name?' She answered, 'I am Drew.'
Finally, he asked the one standing on the right, 'Who is standing in the middle?' She answered, 'She is Diana.'
Victor was left baffled. He asked the questions three times and received different answers every time.
Can you tell who was who?
It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.
What is it?
How many pluses should we put between the digits of 987654321 to get a total of 99, and where?
Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?
You knock a Table over in the library, and suddenly 20 eyes are looking at you.
A network of 20 x 10 squares is given to you.
Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?
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.
