Question

From $6$ am to $6$ pm, the number of times the angle between the two hands of a clock is ${180}^o$ is

• A. $2$
• B. $11$
• C. $13$
• D. $14$

Answer 1

The correct option is B $11$

The two hands of a clock make ${180}^o$ when they face each other in a straight line.
This happens 11 times in 12 h.
At 6 am and 6 pm, two hands form ${180}^o$
Number of times they form ${180}^o$ = 11