Solved IB ACIO Question
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Q · Clockmedium · 45s
A clock goes fast by one minute during the first hour, by two minutes at the end of the second hour, by 4 minutes at the end of 3rd hour, by eight minutes by the end of 4th hour, and so on. At the end of which hour, will it be fast by just over sixty minutes?
TopicClock
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.25
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
First hour 🡪 1 minute
Second hour 🡪 2 minutes
Third hour 🡪 4 minutes
Fourth hour 🡪 8 minutes
Fifth hour 🡪 16 minutes
Sixth hour 🡪 32 minutes
Seventh hour 🡪 64 minutes
Final Answer: Option C - Seventh