Which number should replace the question mark?

Category: 
Correct Answers: 
219
Points: 
1

How many squares on a chessboard?

Category: 
Correct Answers: 
27
Points: 
1

What number comes next?

Look at the series (1,9,5,49,11,169,17), determine the pattern, and find the value of the next number!
Category: 
Correct Answers: 
37
Points: 
1

Find the right combination

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Category: 
Correct Answers: 
5
Points: 
6

Which is a winning combination of digits?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Category: 
Correct Answers: 
3
Points: 
8
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