What hides this stereogram?

Stereogram - 3D Image
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Correct Answers: 
102
Points: 
1

What number comes next?

Look at the series (1, 32, 243, 1024), determine the pattern, and find the value of the next number! (Author: Dejan Marsenic)
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Correct Answers: 
20
Points: 
1

What hides this stereogram?

Stereogram - 3D Image
Category: 
Correct Answers: 
34
Points: 
1

What a winning 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.
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Correct Answers: 
1
Points: 
10

Calculate axb

Look at the series (314, 412, a, 832, 848, b, 8480), determine the pattern, and calculate axb.
Category: 
Correct Answers: 
6
Points: 
8
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