A watch reads 3:30. If the minute hand points towards the north-east direction, then in what direction will the hour hand point?
- ASouth-west
- BNorth-west
- CSouth-east
- DNorth-east
Solution & Step-by-step Explanation
Let's first determine the standard positions of the hands at 3:30 on a normal clock face:
At 3:30, the minute hand points exactly at 6 (which is South in the standard orientation).
The hour hand is exactly halfway between 3 and 4 (which is South-East in the standard orientation).
Now, according to the problem, the orientation is rotated:
The standard South (minute hand direction) is now called North-East.
Let's find the angular shift:
Moving from South to North-East clockwise is a rotation of 225
∘
(or 135
∘
counter-clockwise).
Let's apply the exact same transformation to the hour hand position (Standard South-East):
Standard South-East is 45
∘
clockwise from South.
Since South shifts to North-East, the hour hand will be 45
∘
clockwise from North-East.
45
∘
clockwise from North-East is East.
Let's re-verify alternative simple orientation mapping:
If Minute hand (at 6 o'clock) = North-East
Moving backwards counter-clockwise on the clock face:
4:30 position would be towards North.
3:30 position (hour hand position between 3 and 4) is 75
∘
counter-clockwise from the minute hand.
Let's subtract 75
∘
counter-clockwise from North-East direction:
45
∘
counter-clockwise from North-East is North.
Another 30
∘
counter-clockwise brings us to North-West.
Therefore, the hour hand points in the North-West direction.
At 3:30, the minute hand points exactly at 6 (which is South in the standard orientation).
The hour hand is exactly halfway between 3 and 4 (which is South-East in the standard orientation).
Now, according to the problem, the orientation is rotated:
The standard South (minute hand direction) is now called North-East.
Let's find the angular shift:
Moving from South to North-East clockwise is a rotation of 225
∘
(or 135
∘
counter-clockwise).
Let's apply the exact same transformation to the hour hand position (Standard South-East):
Standard South-East is 45
∘
clockwise from South.
Since South shifts to North-East, the hour hand will be 45
∘
clockwise from North-East.
45
∘
clockwise from North-East is East.
Let's re-verify alternative simple orientation mapping:
If Minute hand (at 6 o'clock) = North-East
Moving backwards counter-clockwise on the clock face:
4:30 position would be towards North.
3:30 position (hour hand position between 3 and 4) is 75
∘
counter-clockwise from the minute hand.
Let's subtract 75
∘
counter-clockwise from North-East direction:
45
∘
counter-clockwise from North-East is North.
Another 30
∘
counter-clockwise brings us to North-West.
Therefore, the hour hand points in the North-West direction.