Find the number of right angles turned through by the hour hand of a clock when it goes from
(a) 3 to 6  
(b) 2 to 8    
(c) 5 to 11
(d) 10 to 1
(e) 12 to 9   
(f) 12 to 6

Explanation

To solve the problem of finding the number of right angles turned through by the hour hand of a clock when it goes from one time to another, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Movement of the Hour Hand:**
- The hour hand completes one full revolution (360 degrees) in 12 hours.
- Therefore, in 1 hour, the hour hand moves \( \frac{360}{12} = 30 \) degrees.

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