Archive · Saturday, October 10, 2026

Hunch #10

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

33 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

OrdersQuestion 2 of 8

In how many different orders can 7 different books stand in a row on a shelf?

Low High orders

Head mathsQuestion 3 of 8

Without a calculator: what is 633 × 7,208?

Low High

CalendarQuestion 4 of 8

How many days after August 15, 1854 is May 28, 1861?

Low High days

DoublingQuestion 5 of 8

There is 1 grain of rice on day 1, and the number doubles every day (2 on day 2, 4 on day 3). How many grains are there on day 33?

Low High grains

InterestQuestion 6 of 8

You put $500 in an account that pays 3% a year, added once a year, and never touch it. What is it worth after 46 years, in dollars?

Low High dollars

PackingQuestion 7 of 8

How many 1-inch cubes fit, packed perfectly with no gaps, in a box 1 ft long, 2 ft wide and 1 ft tall?

Low High cubes

FoldingQuestion 8 of 8

A sheet of paper 0.1 mm thick is folded in half 33 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

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