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: 81,616

Hi;

**In mathematics, you don't understand things. You just get used to them.I have the result, but I do not yet know how to get it.All physicists, and a good many quite respectable mathematicians are contemptuous about proof.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 12,944

Hi anonimnystefy and bobbym,

The solution #1544 is perfect. Good work!

#1545. A train is moving at a speed of 132 kilometers per hour. If the length of the train is 110 meters, how long would it take to cross a platform 165 meters long?

Character is who you are when no one is looking.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 81,616

Hi ganesh;

**In mathematics, you don't understand things. You just get used to them.I have the result, but I do not yet know how to get it.All physicists, and a good many quite respectable mathematicians are contemptuous about proof.**

Offline

**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 14,836

Hi ganesh

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

Offline

**Denominator****Member**- Registered: 2009-11-23
- Posts: 152

Hi guys;

This took me longer than expected to answer >_<

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 12,944

Hi bobbym, anonimnystefy, and Denominator,

The solution #1545 is correct. Good work!

#1546. Two pipes A and B can fill the tank in 20 hours and pipe A alone can fill the tank in 36 hours. Find the time taken by B alone to fill the tank.

Character is who you are when no one is looking.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 81,616

Hi;

**In mathematics, you don't understand things. You just get used to them.I have the result, but I do not yet know how to get it.All physicists, and a good many quite respectable mathematicians are contemptuous about proof.**

Offline

**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 14,836

Hi ganesh

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 12,944

Hi bobbym and anonimnystefy,

The solution #1546 is perfect. Neat work!

#1547. What Principal would yield $60 as Simple Interest at 6% per annum in 5 years?

Character is who you are when no one is looking.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 81,616

Hi;

I have the result, but I do not yet know how to get it.

All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

**Denominator****Member**- Registered: 2009-11-23
- Posts: 152

Hey

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 12,944

Hi bobbym and Denominator,

The solution #1546 is perfect. Good work!

#1548. Find the missing figure: 0.25% of ? = 0.04

Character is who you are when no one is looking.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 81,616

Hi ganesh;

I have the result, but I do not yet know how to get it.

All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

**Denominator****Member**- Registered: 2009-11-23
- Posts: 152

Hey ganesh

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 12,944

Hi bobbym and Denominator,

Good work, bobbym!

#1549. Difference of two numbers is 1660. If 7.5% of one number is 12.5% of the other number, find the two numbers.

Character is who you are when no one is looking.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 81,616

Hi ganesh;

I have the result, but I do not yet know how to get it.

All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

**Denominator****Member**- Registered: 2009-11-23
- Posts: 152

Oh I seeeee

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 12,944

Hi bobbym and Denominator,

The solution #1549 is correct. Brilliant!

#1550. It costs $1 to photocopy a sheet of paper. However, 2% discount is allowed on all photocopies done after first 1000 sheets. How much would it cost to copy 5000 sheets of paper?

Character is who you are when no one is looking.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 81,616

Hi ganesh;

I have the result, but I do not yet know how to get it.

All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

**Denominator****Member**- Registered: 2009-11-23
- Posts: 152

Hey ganesh;

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 12,944

Hi bobbym and Denominator,

The solution #1550 is correct. Excellent!

#1551. The ratio of the base and the height of a cylinder is 2:3. If its volume is 12936 cubic cm, what is the total surface area of the cylinder? (Use pi = 22/7)

Character is who you are when no one is looking.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 81,616

Hi ganesh;

I have the result, but I do not yet know how to get it.

All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

**Denominator****Member**- Registered: 2009-11-23
- Posts: 152

Hi ganesh

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 12,944

Hi bobbym and Denominator,

Excellent, Denominator! Keep it up!

#1552. The curved surface area of a cylindrical pillar is 264 meters square and its volume is 924 cubic meters. Find the ratio of its diameter to its height.

Character is who you are when no one is looking.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 81,616

Hi ganesh;

I have the result, but I do not yet know how to get it.

All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline