Brain Out Level 133

Overview

The level compares two candles of different heights and burn times, asking at what time the two candles reach the same height. The candle problem is a rate question: each candle shrinks at its own burn speed, and the shared height occurs after a number of hours that matches the expected answer 6. The solution is entered as a time value rather than an object interaction.
The two candles start at different heights and burn for different lengths of time, so their remaining heights cross at a point that depends on both burn rates.

• Difficulty: Regular
• Estimated moves: 1

Step-by-Step Solution

1. Write down the two candles: the 50 cm candle lasts 3 hours, and the 70 cm candle lasts 6 hours.
2. Model how each candle loses height over time. The shorter candle burns down faster in relative terms, while the taller one burns more slowly.
3. Track the heights hour by hour until the two remaining lengths meet. The moment their heights coincide occurs at the 6-hour mark.
4. Enter 6 in the answer field as the number of hours.
5. Confirm the value. The level accepts 6 when the equal-height time matches the candle rates.

Write the starting height and duration for each candle, then track how its length shrinks hour by hour rather than judging from the taller candle's size alone. Compare the two remaining heights at each time step until they match, which lands at the six-hour mark. Enter 6 as the number of hours in the field and confirm. If the candles seem to match earlier, recheck the rates, because the taller candle burns more slowly and the shorter one catches down to it over time.

Work the candle heights in whole-hour steps so the crossing point is easy to read, and remember the taller candle's slower burn means it does not stay ahead by the same margin as the hours pass. Enter the hour number once the two remaining lengths coincide, and do not convert that time into a centimeter answer, since the field asks for when, not how high.

Strategy & Reasoning

A candle puzzle depends on burn rate, not the starting height alone. Both candles disappear by the end of their own durations, and the crossing point of their height curves is what the question asks for. Working through the rates instead of guessing from the taller candle's size shows why the meeting time lands on 6 hours, and the number is entered directly into the input field. Candle puzzles are rate problems: the starting height alone does not decide when the lengths coincide, so each candle's burn speed has to be followed across the hours. The meeting time comes from comparing the two shrinking curves, and the field expects that hour number, not a remaining height in centimeters.

Tips & Common Mistakes

• Compare burn speeds over time; the starting height alone will not tell you when the candles match.
• The answer is a time in hours, not a remaining height in centimeters.
• Do not assume the taller candle stays taller forever; its slower burn lets the shorter one catch down to a shared level.