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

You are not logged in.

- Topics: Active | Unanswered

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,704

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,246

No, right?

21. Back to normal! 89 + 2 = p25 - 6 = ?

22. p18 - p4 = ?

*Last edited by mathaholic (2014-01-03 17:08:37)*

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,704

No is correct for 19 - 20.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,246

For 21: 91.

22. 61 - 7 = 54.

23. Is 2:17 prime?

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,704

What is 2:17?

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,246

Logic hint: Convert it to seconds, and then answer is it prime?

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,704

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,246

137 is prime.

Next questions tomorrow

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,704

Hi mathaholic;

I will be here, same bat time, same bat channel.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,246

I mean in my time.

23 should have been 24, lol.

25. What is 1/4 of p16?

26. How many hours are there in 67 days?

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,704

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

Offline

mathaholic wrote:

Logic hint: Convert it to seconds, and then answer is it prime?

bobbym does not like Logic

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'

'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'

I'm not crazy, my mother had me tested.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,704

Oooga chaga, ooga chaga, ooga ooga chaga...

That is true. Boole was a nut too.

Same bat time, same bat channel.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,246

Sorry bobbym.

Now, what is the answer to the questions?

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,704

That is a joke. Your questions are fine. The questions have already been answered and I must leave now.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,246

27. What is p14 - p4?

28. What is p29 - 52?

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,704

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,246

Okay.

29. What is p19 - p3[sup]2[/sup]?

30. What is the square root of the largest known prime number?

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,704

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,246

Unbelievable answer for 30.

31. What is p222 - p199?

32. What is the square root of the above?

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,704

Hi;

The largest known prime has 17425170 digits. Now is it believable?

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,246

I know that. As in the square root.

33. Square p33.

34. Square p1 6 times.

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,704

The square root will have roughly half as many digits.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,246

Oh. People not smarter than you may think 2[sup]6[/sup] in 34, or 64. That's good. i said square. Not power right?

35. 5^p2-(p4-p2)

36. 48 + (p20 - p12)

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,704

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

Offline