Archive · Wednesday, October 7, 2026

Hunch #7

For each question, give a low and a high you are 80% sure the answer sits between. Tighter brackets score more; a miss scores zero. You can type 2 million, 3e9, 1.5k or 45%.

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BirthdaysQuestion 1 of 8

26 people are in a room. Counting all 365 birthdays as equally likely (ignore February 29), what is the chance, in percent, that at least two of them share a birthday?

Low High percent

PackingQuestion 2 of 8

How many 1-inch cubes fit, packed perfectly with no gaps, in a box 8 ft long, 5 ft wide and 5 ft tall?

Low High cubes

FoldingQuestion 3 of 8

A sheet of paper 0.1 mm thick is folded in half 30 times (pretend that is possible: ordinary paper is hard to fold more than 7 or 8 times). How thick is the folded stack, in metres?

Low High metres

ClockworkQuestion 4 of 8

How many hours are there in 36 years of 365 days?

Low High hours

DoublingQuestion 5 of 8

There is 1 penny on day 1, and the number doubles every day (2 on day 2, 4 on day 3). How many pennies are there on day 17?

Low High pennies

Head mathsQuestion 6 of 8

Without a calculator: what is 500 × 1,770?

Low High

DiceQuestion 7 of 8

You roll one fair six-sided die 18 times. What is the chance, in percent, of rolling at least one six?

Low High percent

OrdersQuestion 8 of 8

In how many different orders can 16 different books stand in a row on a shelf?

Low High orders

No Hunch Book on this browser: you can keep the score in a new one after you see it.