Math Is Fun Forum

gmsc

Member

Registered: 2008-10-05

Posts: 11

Math Questions (Easy?)

1. In 1978, Raymond Smullyan wrote a book about logical puzzles. What is the name of this book?

2. I am the square root of -1. Who am i?

3. What would the value of 190 in hexadecimal be?

4. Twenty-nine is a prime example of what kind of number?

5. The reciprocal of

is half of what number?

6. How many consonants are in "one"? How many in "two"? And how many in "three"?

7. What do you do to the length of an edge of a cube to find its volume?

These questions are based on the principle of self-recursion. To learn more about self-recursion, click here.

Last edited by gmsc (2008-10-14 10:58:20)

JaneFairfax

Member

Registered: 2007-02-23

Posts: 6,868

Re: Math Questions (Easy?)

8. Rationals and irrationals are real examples of what kind of numbers?

9. Is it normal for two straight lines to have gradients whose product is −1?

Last edited by JaneFairfax (2008-10-15 10:02:20)

careless25

Real Member

Registered: 2008-07-24

Posts: 560

Re: Math Questions (Easy?)

Last edited by careless25 (2008-10-15 09:32:19)

Chewy

Member

Registered: 2008-08-07

Posts: 67

Re: Math Questions (Easy?)

Last edited by Chewy (2008-10-15 13:03:51)

Chewy

Member

Registered: 2008-08-07

Posts: 67

Re: Math Questions (Easy?)

Chewy

Member

Registered: 2008-08-07

Posts: 67

Re: Math Questions (Easy?)

Chewy

Member

Registered: 2008-08-07

Posts: 67

Re: Math Questions (Easy?)

10. What is the converse of

?

11. The inverse of statement in # 10?

12. The contrapositive of statement in # 10 ?

Last edited by Chewy (2008-10-15 13:39:04)

Chewy

Member

Registered: 2008-08-07

Posts: 67

Re: Math Questions (Easy?)

13. Is

a formula for the number of subsets of a set in set theory?

Chewy

Member

Registered: 2008-08-07

Posts: 67

Re: Math Questions (Easy?)

I am sorry. You will never see me post here or any forum at this site ever again. My apologies. Goodbye.

JaneFairfax

Member

Registered: 2007-02-23

Posts: 6,868

Re: Math Questions (Easy?)

THESE are more examples of self-recursive questions.

10. How many letters are in “four”?

11. What do you do to the length of a side of a square to find its area?

12. If two angles add up to 90°, can it be right?

See the pattern yet?

ZHero

Real Member

Registered: 2008-06-08

Posts: 1,889

Re: Math Questions (Easy?)

Just read the post... Nice patterns up there Jane!!

Another one...
How much is -40 degree Celsius in degree Fahrenheit??

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If two or more thoughts intersect, there has to be a point!

All_Is_Number

Member

Registered: 2006-07-10

Posts: 258

Re: Math Questions (Easy?)

I see Skitt's law is alive and well. Apparently JaneFairfax does not understand recursion, either.

The only example of recursion so far in this thread has been gmsc's link. Placing the word that answers the question within the question doesn't make that question recursive. It might make it clever, perhaps, but it does not make it recursive.

Examples of recursiveness:

The first two examples are finitely recursive, while the third example is infinitely recursive.

Do you see the pattern yet, Ms. Fairfax?

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You can shear a sheep many times but skin him only once.

mathsyperson

Moderator

Registered: 2005-06-22

Posts: 4,900

Re: Math Questions (Easy?)

I am sorry. You will never see me post here or any forum at this site ever again. My apologies. Goodbye.

I can only hope you decide to change your mind.
Jane wasn't personally attacking you, she just reacts far, far too strongly to things sometimes.
I find it's best to just ignore her outbursts until she turns back into Dr. Janekyll.

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Why did the vector cross the road?
It wanted to be normal.

careless25

Real Member

Registered: 2008-07-24

Posts: 560

Re: Math Questions (Easy?)

Oi! Sry! Sry!

k i get it now.