If Mary’s daughter is my daughter’s mother, who am I to Mary?
(a) Grandmother
(b) Mother
(c) Daughter
(d) Granddaughter
(e) I am Mary
Logic Riddles
Five 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.
Largest Amount of Area with Least Amount of Fence
A farmer challenges an engineer, a physicist, and a mathematician to fence off the largest amount of area using the least amount of fence.
The engineer made his fence in a circle and said it was the most efficient.
The physicist made a long line and said that the length was infinite. Then he said that fencing half of the Earth was the best.
The mathematician laughed at the others and with his design, beat the others. What did he do?
Riddle AnswerFingers on 10 Hands
Coffee Tea Mix
Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea.
Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee?
Riddle Answer