Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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**ganesh****Moderator**- Registered: 2005-06-28
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(xxii) 6, 28, 496, _____.

(xxiii) 2, 4, 10, 20, 40, 100, 200, 400, 1000, ______, ______.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**mathsyperson****Moderator**- Registered: 2005-06-22
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Why did the vector cross the road?

It wanted to be normal.

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**JaneFairfax****Member**- Registered: 2007-02-23
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**ganesh****Moderator**- Registered: 2005-06-28
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Both the answers are correct!**well done, mathsyperson and JaneFairfax!!!**

(xxiv) B, C, F, H, ____, _____.

(xxv) 3, 7, 31, 211, 2311, _____.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**JaneFairfax****Member**- Registered: 2007-02-23
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**ganesh****Moderator**- Registered: 2005-06-28
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Both correct, JaneFairfax!

(xxvi) bc, fg, jk, pq, ______.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**JaneFairfax****Member**- Registered: 2007-02-23
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**ganesh****Moderator**- Registered: 2005-06-28
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Correct, JaneFairfax!**Good work!!!**

(xxvii) 7, 8, 5, 5, 3, 4, ____, _____.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**JaneFairfax****Member**- Registered: 2007-02-23
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**ganesh****Moderator**- Registered: 2005-06-28
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Correct, JaneFairfax!**Excellent!!!**

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**ganesh****Moderator**- Registered: 2005-06-28
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(xxviii) 2, 3, 4, 5, 7, 8, 9, 11, 13, 16, 17, 19, 23, 25, 27, 29, 31, 32, 36, _____, _____.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**ganesh****Moderator**- Registered: 2005-06-28
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(xxix) 25, 121, ____.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**Muggleton****Member**- Registered: 2009-01-15
- Posts: 65

JaneFairfax, how did you get the answer to (xxvii)?

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**JaneFairfax****Member**- Registered: 2007-02-23
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Now you mention it, Im danged if I can remember!

The answer probably came to me in a flash of inspiration; now its gone.

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**ganesh****Moderator**- Registered: 2005-06-28
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Muggleton wrote:

JaneFairfax, how did you get the answer to (xxvii)?

Muggleton,

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**Muggleton****Member**- Registered: 2009-01-15
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Ooh! It looks all so simple once you know the answer that it makes you feel kinda stupid wondering why you never thought of it before.

Thanks.

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**ganesh****Moderator**- Registered: 2005-06-28
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A pleasure, Muggleton! But I have to tell you, both (xxviii) and (xxix) aren't that simple

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**JaneFairfax****Member**- Registered: 2007-02-23
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**JaneFairfax****Member**- Registered: 2007-02-23
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**ganesh****Moderator**- Registered: 2005-06-28
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Answers to (xxix):-

Both the answers are perfectly right, mathematically. Truly commendable effort!**Keep it up, JaneFairfax! **

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**JaneFairfax****Member**- Registered: 2007-02-23
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**ganesh****Moderator**- Registered: 2005-06-28
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You are perfectly right, JaneFairfax! 36 shouldn't have figured in the series! That was a blunder!!! Thnks for telling me I put a wrong number in the question....I'd have to be slower, with a much greater degree of accuracy!!!

You have solved the puzzle!

(xxx) e, n, d, d, d, n, ____, ____

(xxxi) 1, 100, 1001, 10000, _______, _______.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**ganesh****Moderator**- Registered: 2005-06-28
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(xxxii) 1, 1, 1, 2, 3, 3 , 4, 5, _____, _______.

(xxxiii) 1, 2, 4, 19, 19, ______, ______. (This question is dedicated to Robin Alderman!)

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**JaneFairfax****Member**- Registered: 2007-02-23
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**ganesh****Moderator**- Registered: 2005-06-28
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Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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