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!
Category: 
Correct Answers: 
37
Points: 
1

Calculate the number 2856

NUMBERMANIA: Calculate the number 2856 using numbers [8, 8, 7, 8, 71, 374] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Category: 
Correct Answers: 
1
Points: 
10

What is hidden in 3D image?

Stereogram - 3D Image
Category: 
Correct Answers: 
56
Points: 
1

Calculate the number 9487

NUMBERMANIA: Calculate the number 9487 using numbers [1, 2, 7, 5, 12, 690] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Category: 
Correct Answers: 
0
Points: 
10
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