self Maths Puzzle

In 12 hours how many times the two hands of clock will be just opposite to each other i.e they make a straight line having difference of 180 degree b/w them ?
(Please explain with concepts considered for this type of problem in detail)

Read Solution (Total 3)

11 times.

After every 1 hour 5.5 minutes approx.
Starting from 6 O'clock, we can check that.
11 years agoHelpfull: Yes(4) No(1)

1-7
2-8
3-9
4-10
5-11
6-12
7-1
8-2
9-3
10-4
11-5
12-6NOT CONSIDER ANS IS 11
11 years agoHelpfull: Yes(1) No(2)
12-6
1-7
2-8
3-9
4-10
5-11
6-12 NOT CONSIDER ANS IS 6
11 years agoHelpfull: Yes(0) No(3)

self Other Question

What is the probability that a non leap year selected at random has 53 mondays Three inlets A,B & C fills the tank and kept open any one at a time. B is twice efficient and is opened for double the time that of A and C is thrice efficient and opened for duration three times that of A. If the tank gets filled in 12 hours then what part of tank is filled by C ?