Question

Shown below is a keyboard designed for smartphones. It has two sizes of keys which are arranged one after the other. What will be the difficulty of independently typing a single coloured key from the origin (key O), arranged from least difficult to most difficult i.e. easiest to type first, most difficult to type last? Assume, the mobile is held vertically in the left hand, and a right-handed user presses the keys using only the index finger of the right hand. 

• A. Orange, Green, Red, Blue
• B. Red, Blue, Orange, Green
• C. Red, Orange, Green, Blue
• D. Orange, Red, Green, Blue

Hint:

When evaluating ergonomic difficulty for typing, consider the distance from the starting point and the natural movement range of the hand.

Answer 1

The Correct Option is D

1. The difficulty of typing each key depends on the distance from the origin (key \(O\)) and the ergonomic reachability for a right-handed user.
2. Based on the arrangement of keys:
- Orange is closest to the origin and is the easiest to type.
- Red is slightly farther but still closer than the other two.
- Green is farther than Orange and Red but still easier to reach compared to Blue.
- Blue is the farthest from the origin and the most difficult to type.
3. Thus, the order of difficulty from least to most difficult is: \( \text{Orange} \rightarrow \text{Red} \rightarrow \text{Green} \rightarrow \text{Blue} \).
Conclusion: The correct order is \(D\): Orange, Red, Green, Blue.