1.  How much does a watch lose per day, if its hands coincide every 64 minutes?
A. 32(8/11) min.
B. 36(5/11) min.
C. 90 min.
D. 96 min.

Answer: Option A

Explanation:

55 min. spaces are covered in 60 min.

60 min. spaces are covered in :

60 x 60 min. = 65 5 min.
55 11

Loss in 64 min:

= 65 5 - 64 = 16 min.
11 11

Loss in 24 hrs:

= 16 x 1 x 24 x 60 min. = 32 8 min.
11 64 11