35 minutes
If current time is 1:20, there are exactly 35 minutes remaining until 1:55 today. This calculation assumes standard 12-hour clock format.
Time Calculation Methods
- Subtract start time from target time
- Count forward from start time
- Use digital clock arithmetic
Comparison of Time Calculation Approaches
| Method | Duration | Accuracy | Complexity |
|---|---|---|---|
| Manual Subtraction | Immediate | High | Low |
| Step-by-Step Counting | Fast | Medium | Low |
| Digital Calculator | Instant | Very High | Very Low |