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

Calculate the number 4218

NUMBERMANIA: Calculate the number 4218 using numbers [8, 4, 5, 6, 90, 799] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Category: 
Correct Answers: 
2
Points: 
9

Calculate the number 9809

NUMBERMANIA: Calculate the number 9809 using numbers [7, 6, 2, 6, 21, 745] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Category: 
Correct Answers: 
0
Points: 
10

Calculate the number 1120

NUMBERMANIA: Calculate the number 1120 using numbers [6, 6, 1, 6, 95, 544] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Category: 
Correct Answers: 
2
Points: 
9

Calculate the number 406

NUMBERMANIA: Calculate the number 406 using numbers [3, 7, 8, 4, 27, 807] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Category: 
Correct Answers: 
1
Points: 
10
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