There is a bottle recycling bin, with one lonely bottle inside. Every hour, on the hour, people come and put bottles into the skip. The first hour, at noon, one person came and put a bottle in. One hour later, two people placed a bottle each into the skip. An hour later four people placed a bottle each into the skip.
This doubling of people continued until 11pm, when the bin was finally full. When was the bin exactly half full?
Riddle AnswerBelow are four multiple-choice entrance exam questions. Can you find the answers?
1. The answer to Question 2 is:
A. B
B. A
C. D
D. C
2. The answer to Question 3 is:
A. C
B. D
C. B
D. A
3. The answer to Question 4 is:
A. D
B. A
C. C
D. B
4. The answer to Question 1 is:
A. DRiddle Answer
B. C
C. A
D. B
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
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 AnswerFive 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.