Calculate the number 350

NUMBERMANIA: Calculate the number 350 using numbers [8, 2, 3, 2, 71, 219] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
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Correct Answers: 
2
Points: 
10

What number comes next?

Look at the series (1,9,5,49,11,169,17), determine the pattern, and find the value of the next number!
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Correct Answers: 
37
Points: 
1

Calculate a x b

Look at the series (156, 615, 561, a, 413, 341, 132, b), determine the pattern, and calculate a x b.
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Correct Answers: 
34
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: 
7
Points: 
4
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