Name that series

Level 2

What number comes next in this series?

1, 4, 9, 10, 19, 24, 31, 40, 51, 64, ???


The answer is 79.

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1 solution

Geoff Pilling
Oct 4, 2016

These are the square numbers in hexadecimal (base 16). The next square number is 12 1 10 = 7 9 16 121_{10} = \boxed{79_{16}}

Lol who would guess a hexadecimal sequence without letters? This Geoff is a genius! More please!

William Nathanael Supriadi - 4 years, 8 months ago

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Haha... Thanks! Will let you know if I can come up with anything else! :O)

Geoff Pilling - 4 years, 8 months ago

Very funny! Can't stop laughing!!!

Andreas Wendler - 4 years, 8 months ago

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Haha... thanks! :0)

Geoff Pilling - 4 years, 8 months ago

Interesting!

Swapnil Das - 4 years, 8 months ago

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