They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

A beggar on the street can make one cigarette out of every 6 cigarette butts he finds. After one whole day of searching and checking public ashtrays the beggar finds a total of 72 cigarette butts. How many cigarettes can he make and smoke from the butts he found?

John and his team plan to rob a safe. They got just one chance to break the code else the local police will be informed. Below are clues:
A) Exactly one number is perfectly placed: 9 8 1
B) Everything is incorrect: 9 2 4
C) Two numbers are part of the code of the safe but are wrongly placed: 0 9 3
D) One number is part of the code of the safe but is wrongly placed: 1 4 7
E) One number is part of the code of the safe but is wrongly placed: 7 8 3

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

Spot what is wrong here in below Picture?

What does this rebus puzzle means ?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

What question can you never answer yes to?