Math Is Fun Forum

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Oral puzzles

Hi;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,406

Re: Oral puzzles

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?

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It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Oral puzzles

Hi ganesh;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: Oral puzzles

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
The knowledge of some things as a function of age is a delta function.

Denominator

Member

Registered: 2009-11-23

Posts: 220

Re: Oral puzzles

Hi guys;

This took me longer than expected to answer >_<

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Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,406

Re: Oral puzzles

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.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Oral puzzles

Hi;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: Oral puzzles

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
The knowledge of some things as a function of age is a delta function.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,406

Re: Oral puzzles

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?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Oral puzzles

Hi;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Denominator

Member

Registered: 2009-11-23

Posts: 220

Re: Oral puzzles

Hey

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Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,406

Re: Oral puzzles

Hi bobbym and Denominator,

The solution #1546 is perfect. Good work!

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

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Oral puzzles

Hi ganesh;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Denominator

Member

Registered: 2009-11-23

Posts: 220

Re: Oral puzzles

Hey ganesh

---

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,406

Re: Oral puzzles

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.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Oral puzzles

Hi ganesh;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Denominator

Member

Registered: 2009-11-23

Posts: 220

Re: Oral puzzles

Oh I seeeee

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Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,406

Re: Oral puzzles

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?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Oral puzzles

Hi ganesh;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Denominator

Member

Registered: 2009-11-23

Posts: 220

Re: Oral puzzles

Hey ganesh;

---

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,406

Re: Oral puzzles

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)

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Oral puzzles

Hi ganesh;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Denominator

Member

Registered: 2009-11-23

Posts: 220

Re: Oral puzzles

Hi ganesh

---

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,406

Re: Oral puzzles

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.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Oral puzzles

Hi ganesh;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.