How many handshakes occur when a group of 7 people shake hands exactly once with every other person in the group?
Riddle AnswerInterview Riddles
2 Eggs 100 Floors
You are given two eggs, and access to a 100-storey building. Both eggs are identical. The aim is to find out the highest floor from which an egg will not break when dropped from a floor. If an egg is dropped and does not break, it is undamaged and can be dropped again. However, once an egg is broken, it cannot be used anymore.
If an egg breaks when dropped from floor N, then it would also have broken from any floor above that. If an egg survives a fall from floor N, then it will also survive any fall below floor N.
What is the minimum number of egg drops required to find the solution?
Riddle Answer100 Married Couples
Every man in a village of 100 married couples has cheated on his wife. Every wife in the village instantly knows when a man other than her husband has cheated, but does not know when her own husband has. The village has a law that does not allow for adultery. Any wife who can prove that her husband is unfaithful must kill him that very day. The women of the village would never disobey this law. One day, the queen of the village visits and announces that at least one husband has been unfaithful. Everyone knows that the queen only speaks the truth. What happens?
Riddle AnswerFive Donors
Five potential donors are sitting on a bench from left to right outside the surgery room and are waiting for the doctor. Their ages are 6, 10, 31, 47 and 61. Their heights are 41, 49, 61, 66 and 75 inches. Their weights are 41, 76, 97, 126 and 166 pounds.
Determine the position, blood group, age, height and weight of each of them with the help of the following ten hints.
- The person on the far right is 37 years older than Jimmy, and is 61 inches tall.
- Jimmy weighs 56 pounds more than his height.
- Alexandrio weighs 76 pounds and is 75 inches tall.
- Justin is type AB and weighs 56 pounds less than Jimmy.
- The person in the center is 10 years old, is blood type AO and weighs 97 pounds.
- Andrew, who is the first, is 66 inches tall, and weighs 100 pounds more than his height.
- The person who is blood type O, is 25 years older than the person to the left of them.
- Kian is 61 years old.
- The person who is blood type A, is 55 years younger than Kian and is not next to the person who is type AO.
- The person who is next to the 10 year old but not next to the person who is 66 inches tall, is blood type B, and weighs 126 pounds.
Fill the Bathtub
A bathtub has two taps and a plug hole. The cold tap on its own fills the bathtub in 18 minutes. The hot one on its own fills the bathtub in 15 minutes. The plug hole can drain the bathtub in 10 minutes with the taps off.
How long will the bathtub take to fill if both taps are turned on and the plug left out?
Riddle Answer