Floor and scheduling puzzles
Floor and scheduling puzzles · who is where and when
Story hook
Imagine a brand-new building near your home. It has five floors, one flat on each floor, and five families are about to move in: the Sharmas, the Khans, the Reddys, the Patels and the Bhatts. The building manager has a little note in his pocket with hints scribbled on it: "The Khans live above the Sharmas. The Reddys are on the very top. The Patels are exactly between the Sharmas and the Reddys."
He can't just guess. But if he draws five empty boxes — one for each floor — and slots families in one hint at a time, the whole puzzle clicks into place in under two minutes. Nobody ends up on the wrong floor. No family is left without a flat.
That little stack of boxes is the secret weapon of this lesson. The exam will hand you the same kind of note — people, floors, days, months, or items — and a fistful of clues. Your job is simply to find out who is where, and when. And the trick, every single time, is to draw a tidy grid and fill it slowly. Let's learn how.
Why this matters for UPSC
CSAT (UPSC Prelims Paper II) is a qualifying paper. That means you do not get rank-points for it — you just need to clear a line. The line is 33%, which works out to 66 marks out of 200. Clear it and you sail on; miss it by even one mark and your whole Prelims is wasted, no matter how brilliant your other paper was. So every safe, get-able mark is precious.
Floor and scheduling puzzles are one of the friendliest buckets in the paper. They need no formulas, no algebra, no fast multiplication — just patience and a neat grid. Anyone who practises a handful of them can get them right. Two to four such questions show up most years. That is "free" marks waiting for the calm, careful candidate.
And the skill is genuinely useful in life. Every time you make a weekly timetable, plan who sleeps in which room on a family trip, or work out the order of speakers at a school function, you are doing exactly this. So you are not learning a "trick for the exam" — you are learning to think clearly when there are many possibilities.
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- Start here (zero knowledge)
- Flow diagram & mind map
- Deep dive
- Real-world connections
- Memory hooks & mnemonics
- The Prelims angle
- The Mains angle
- The Interview angle
- Common traps & misconceptions
- 5-minute revision card
- Related topics
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