Try to figure out the answers from the 2 patterns below. Find all the 10 digits first. Rotate if necessary.
A: What is the missing number? [?]    
B- What is the missing number? [?] [ 3] [ 7] [ 2] [ 6]
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The images can be divided such that line segments can be grouped to represent a (possibly rotated) number that would appear on a digital clock. Each line segment must be used once.
The image also contains at least one of each numeric digit.
Then, you group adjacent numbers together and take their sums. Reading the sums clockwise will get you the sequence in the proper order.
We have [?], 10 (1+9), 11 (8+3), 9 (2+7), 11 (6+5).
So the unknown must be 4+0 = 4.
B: In progress. My strategy may be wrong because I can't find a solution. There are 4 locations that could be the "0", and all of them result in line segments that aren't numeric.