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: 
10
Points: 
2

Which number should replace the question mark?

Which number should replace the question mark?
Category: 
Correct Answers: 
2
Points: 
9

Calculate the number 1924

NUMBERMANIA: Calculate the number 1924 using numbers [9, 5, 9, 1, 21, 106] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
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Correct Answers: 
4
Points: 
7

Calculate the number 552

NUMBERMANIA: Calculate the number 552 using numbers [1, 5, 2, 8, 51, 151] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Category: 
Correct Answers: 
0
Points: 
10
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