What is hidden in 3D image?

Stereogram - 3D Image
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Correct Answers: 
115
Points: 
1

Calculate the number 1401

NUMBERMANIA: Calculate the number 1401 using numbers [9, 6, 6, 3, 45, 808] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
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Correct Answers: 
9
Points: 
10

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!
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Correct Answers: 
37
Points: 
1

How many triangles can be formed from the given points?

Author: Nebojsa Jevtovic (Serbia)
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Correct Answers: 
13
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.
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Correct Answers: 
23
Points: 
1
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