Mathematics, applications of mathematics to life in general, and my life as a mathematician.

How many letters are there in the correct answer to this question?

Four?

Four

Twelve plus one?

ONE PLUS TWELVE

(TWO PLUS ELEVEN)

0

There are thirty six letters in the answer

Maybe eleven

Certainly sixteen

Any number n whose value can be expressed using n letters, for example sixty seven

Zero plus one plus two plus three plus …

This question is a *fantastic* way to make a bright 12-year kid shut up and think.

Feed in a couple of ideas, and a *really* bright group can get to {Michael Albert}’s answer.

But: if you just want to stop the noise from an 11-year-old kid: ask this.

Dix-sept (en français)

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## Petter:

Four?

22 November 2015, 5:37 pm## Dan:

Four

22 November 2015, 5:39 pm## Michael:

Twelve plus one?

22 November 2015, 6:36 pm## MQ:

ONE PLUS TWELVE

(TWO PLUS ELEVEN)

22 November 2015, 6:48 pm## Leo:

0

22 November 2015, 7:45 pm## lvps1000vm:

0

22 November 2015, 7:55 pm## Chaz:

There are thirty six letters in the answer

22 November 2015, 9:12 pm## Michael Albert:

Maybe eleven

22 November 2015, 9:50 pm## Michael Albert:

Certainly sixteen

22 November 2015, 9:52 pm## Michael Albert:

Any number n whose value can be expressed using n letters, for example sixty seven

22 November 2015, 9:55 pm## Bob Hearn:

Zero plus one plus two plus three plus …

22 November 2015, 11:05 pm## Chaz:

This question is a *fantastic* way to make a bright 12-year kid shut up and think.

Feed in a couple of ideas, and a *really* bright group can get to {Michael Albert}’s answer.

But: if you just want to stop the noise from an 11-year-old kid: ask this.

23 November 2015, 9:29 am## Austin:

Dix-sept (en français)

23 November 2015, 3:48 pm