Q:

# What letter comes next in the sequence "O, T, T, F, F"?

A:

The letter that comes next in the sequence O, T, T, F, F, is S. Each letter represents the first letter of each number in the sequence of natural numbers. S stands for "Six."

## Keep Learning

The sequence "O, T, T, F, F" and similar phrases, such as "O, T, T, F, F, S, S," are mentioned on a variety of brain teaser and trivia sites, such as Chaos Trivia, Braingle and others. The phrase contains the first letter of each natural number: "One, Two, Three, Four, Five." Therefore, the next several terms in the numeric sequence are: "Six, Seven, Eight, Nine, Ten." Based on the nature of the riddle, this is written out as: "O, T, T, F, F, S, S ,E, N, T" and so on.

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## Related Questions

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If a reaction is run at a constant temperature, T, the equation is delta G equals delta H minus T times delta S. This is the measurement of whether a chemical reaction is likely to occur with no additional energy input.

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The formula calculating work output is F*D/T, where F is the force exerted, D is the distance and T is the time. The work output of a system is also described as its Power.

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In Scrabble, J, K, Q, X and Z have one tile each; there are two B, C, F, H, M, P, V, W and Y tiles; there are three G tiles, four D, L, S and U tiles, six N, R and T tiles, eight O tiles, nine A and I tiles and 12 E tiles. There are 100 tiles total.