Convert 27°C to Kelvin.

**The reasoning** The Kelvin scale and Celsius scale measure the same thing (temperature), but they start at different points. The key formula is: **K = °C + 273** (Some textbooks use 273.15, but for JAMB/WAEC, 273 is standard) So: K = 27 + 273 = **300 K** Think of it this way: 0°C (water freezes) = 273 K. You're just shifting the scale up by 273 units. The *size* of one degree is the same on both scales—only the starting point differs. **Why the wrong options tempt you** - **A (27 K):** You forgot to add 273—you just wrote the same number with K instead of °C - **B (100 K):** Maybe you confused this with the boiling point of water (100°C = 373 K), or did random math - **C (246 K):** You *subtracted* 273 instead of adding it—sign error! **Quick takeaway** To go from Celsius to Kelvin, always **add 273**—you're counting up from absolute zero, not from the freezing point of water.