Calculate the number 8427

NUMBERMANIA: Calculate the number 8427 using numbers [3, 9, 3, 8, 91, 950] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
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Correct Answers: 
0
Points: 
10

What is abcdef?

a != b != c != d !=e != f
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Correct Answers: 
13
Points: 
1

Calculate the number 1074

NUMBERMANIA: Calculate the number 1074 using numbers [4, 4, 7, 4, 21, 995] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
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Correct Answers: 
0
Points: 
10

What hides this stereogram?

Stereogram - 3D Image
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Correct Answers: 
111
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: 
2
Points: 
9
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