Next Roman numerals in the following sequences and series Quiz by Cryptus

Sequence/Series	Next term	Explanation
I, III, VI, X, XV, XXI...		Triangle numbers.
II, III, V, VII, XI, XIII...		Prime numbers.
I, II, III, IV, V, VI...'		Add 1 each time.
I, VIII, XXVII, LXIV, CXXV, CCXVI...		Cube numbers.
VI, VIII, XXXII, XXXIV, CCCXXXVI, CCCXXXVIII...		Add 2, multiply by 4, repeat.
I, II, VI, XXIV, CXX, DCCXX...		Factorials. (3!=321)
IV, VIII, XV, XVI, XXIII...		Sequence from the TV show Lost.
III, IX, XXVII, LXXXI, CCXLIII, DCCXXIX...		Increasing powers of 3.
I, I, II, III, V, VIII...		Fibonacci sequence.
II, IV, VIII, XVI, XXXII, LXIV...		Increasing powers of 2.

Sequence/Series	Next term	Explanation
III, VI, IX, XII, XV, XVIII...		Add 3 each time.
IV, VI, IX, XIV, XXI, XXXII...		Add successive prime numbers.
XXVII, LIV, XVIII, XXXVI, XII, XXIV...		Multiply by 2, divide by 3, repeat.
XXIV, XXV, XXIII, XXVI, XXII, XXVII...		Add 1, subtract 2, add 3 etc.
VI, XVII, XXVIII, XXIX, L, LXI...		Add 11 each time.
III, I, IV, I, V, IX...		Pi.
II, XII, XXX, LVI, XC, CXXXII...		12, 34, 5*6 etc.
XCVIII, XCVII, XCV, XCII, LXXXVIII, LXXXIII...		Subtract 1, 2, 3 etc.
I, IV, IX, XVI, XXV, XXXVI...		Square numbers.
CCCXX, CLX, LXXX, XL, XX, X...		Divide by 2.

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What Comes Next: Roman Numerals Quiz

by Cryptus

Created Jan 25, 2013 in Science
Game Plays 14

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	ostroffj:	Jan 25th, 2013 at 14:45 GMT		1 point
	Good start, but quite a few mistakes: • The 12, 34, 56 sequence has two errors: 34 is not 22, and 1112 is not 121. • In the add 2, multiply by 4 sequence, 344 is 136, not 336. • In the multiply by 2, divide by 3 sequence, 36/3 should be 12, not 22. • The "multiply by 3" sequence is actually adding by 3, and the answer is wrong: 18 + 3 = 21, not 22. • 9 isn't a prime number. • Accept single character answers!

	Cryptus:	Jan 25th, 2013 at 15:35 GMT		1 point
	Yep, played this through (probably just as you were typing this!) and noticed an abnormally large amount of mistakes, which I was most displeased with myself about. All have now been fixed (finishing this at half 2 in the morning was probably not the best idea!).