Practice Room · Arrangements and choices

Practice: Orders

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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OrdersQuestion 1 of 5

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

Low High orders

OrdersQuestion 2 of 5

In how many different orders can 9 different books stand in a row on a shelf?

Low High orders

OrdersQuestion 3 of 5

In how many different orders can 6 different books stand in a row on a shelf?

Low High orders

OrdersQuestion 4 of 5

In how many different orders can 12 different books stand in a row on a shelf?

Low High orders

OrdersQuestion 5 of 5

In how many different orders can 17 different books stand in a row on a shelf?

Low High orders

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