Who is the mysterious person behind the glass?

Who is the mysterious person behind the glass?
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Correct Answers: 
17
Points: 
1

Calculate the number 678

NUMBERMANIA: Calculate the number 678 using numbers [3, 8, 9, 5, 80, 315] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
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Correct Answers: 
0
Points: 
10

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.
Category: 
Correct Answers: 
20
Points: 
1

What number comes next?

Look at the series (5391, 8427, 3176, 5351), determine the pattern, and find the value of the next number!
Category: 
Correct Answers: 
71
Points: 
1

Calculate the number 7180

NUMBERMANIA: Calculate the number 7180 using numbers [3, 8, 6, 6, 13, 875] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Category: 
Correct Answers: 
1
Points: 
10
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