Which number should replace the question mark?

Category: 
Correct Answers: 
219
Points: 
1

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: 
25
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.
Category: 
Correct Answers: 
15
Points: 
1

Calculate the number 4460

NUMBERMANIA: Calculate the number 4460 using numbers [1, 1, 4, 7, 63, 804] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Category: 
Correct Answers: 
0
Points: 
10

Calculate the number 252

NUMBERMANIA: Calculate the number 252 using numbers [6, 6, 8, 7, 88, 990] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Category: 
Correct Answers: 
0
Points: 
10
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