THING TO DO DEVOTE ALOT OF TIME THINKING ABOUT IT BUT HATE YOU RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

Let us denote the four people with A, B, C and D.
A takes 1 minute to cross, B takes 2, C takes 5 and D takes 10.

A and B cross first spending 2 minutes.
A comes back with torch taking 1 minute.
C and D cross taking 10 minutes.
B comes back with torch taking 2 minutes.
Finally, A and B cross the bridge taking 2 minutes.

2 + 1 + 10 + 2 + 2 = 17 minutes

Thus, this is the way they all managed to cross that bridge that night. Did you answer this riddle correctly?
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The faster watch gains on the slower one at the rate of three minutes every hour. After 20 hours, the faster one will be ahead by one hour. Did you answer this riddle correctly?
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Time Did you answer this riddle correctly?
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Bones! Did you answer this riddle correctly?
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When you are using military time! Did you answer this riddle correctly?
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