Math Is Fun Forum

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,422

Re: 10 second questions

Hi bobbym,

The solution #4387 is correct. Good work!

#4388. A trader marked the selling price of an article at 10% above the cost price. At the time of selling, he allows certain discount and suffers a loss of 1%  What is the percentage discount he allowed?

#4389. A shopkeeper fixes the marked price of an item 35% above its cost price. What is the percentage of discount allowed to gain 8%?

---

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: 10 second questions

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: 48,422

Re: 10 second questions

Hi bobbym,

The solutions #4388 and #4389 are correct. Neat work!

#4390. Kevin bought a suitcase with 15% discount on the labelled price. He sold the suitcase for $2880 with 20% profit on the labelled price. At what price did he buy the suitcase?

#4391. A shopkeeper sells a badminton racket, whose marked price is $30, at a discount of 15% and gives a ball costing $1.50 free with each racket. Even then he makes a profit of 20%. What is the cost price per racket?

---

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: 10 second questions

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: 48,422

Re: 10 second questions

Hi bobbym,

The solutions #4390 and #4391 are correct. Neat work!

#4392. A shopkeeper sold a television set for $17,940 with a discount of 8% and earned a profit of 19.6%. What would have been the percentage of profit earned if no discount was offered?

#4393. A shopkeeper sells 25 articles at $45 per article after giving 10% discount and earns 50% profit. If the discount is not given, what is the profit percent earned?

---

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: 10 second questions

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: 48,422

Re: 10 second questions

Hi bobbym,

The solutions #4392 and #4393 are correct. Neat work!

#4394. What is the value of (log[sub]3[/sub]4)(log[sub]4[/sub]5)(log[sub]5[/sub]6)(log[sub]6[/sub]7)(log[sub]7[/sub]8)(log[sub]8[/sub]9)?

#4395. Find the value of

.

---

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: 10 second questions

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: 48,422

Re: 10 second questions

Hi bobbym,

The solutions #4394 and #4395 are correct. Outstanding!

#4396. Find the value of

---

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.

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: 10 second questions

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.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,422

Re: 10 second questions

Hi anonimnystefy and bobbym,

The solution #4396 is correct. Neat work!

#4397. If a = b[sup]x[/sup], b = c[sup]y[/sup], and c = a[sup]z[/sup], then what is the value of xyz?

#4398. If log 3 = 0.477, and (1000)[sup]x[/sup], then what is the value of x?

---

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: 10 second questions

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: 48,422

Re: 10 second questions

Hi bobbym,

The solution #4397 is correct. Good work!

Regarding the problem #4398, I typed the problem incomplete. Regretted!
The problem should read
If log 3 = 0.477 and (1000)[sup]x[/sup] = 3, then what is x equal to?

#4399. If log[sub]10[/sub]2 = 0.3010 and log[sub]10[/sub]3 = 0.4771, then what is the value of log[sub]10[/sub]1.5?

#4400. If log[sub]10[/sub]2 = 0.3010 and log[sub]10[/sub]7 = 0.8451, then what is the value of log[sub]10[/sub]2.8?

---

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: 10 second questions

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: 10 second questions

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: 48,422

Re: 10 second questions

Hi bobbym and anonimnystefy,

The solutions #4398, #4399, and #4400 are correct. Brilliant!

#4401. If log (0.57) =

, then what is the value of

?

#4402. If log 2 = 0.30103, what is the number of digits of 2[sup]64[/sup]?

---

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: 10 second questions

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: 48,422

Re: 10 second questions

Hi bobbym,

The solution #4401

The solution #4402 is correct. Good work!

#4403. If log 2 = 0.3010 and log 3 = 0.4771, find the values of
(a) log 25
(b) log 4.5

#4404. If log 2 = 0.30103, find the number of digits in 2[sup]56[/sup].

---

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: 10 second questions

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: 48,422

Re: 10 second questions

Hi bobbym,

The solutions #4403 and #4404 are correct. Neat work!

#4405. A boat moves upstream at the rate of 1 kilometer in 12 minutes and downstream at the rate of 1 kilometer in 5 minutes. Find the speed of the current in kilometers per hour.

#4406. River is running at 3 kilometers per hour. It takes a man twice as long to row up as to down the river. Find the rate of the man in still water.

---

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: 10 second questions

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: 48,422

Re: 10 second questions

Hi bobbym,

The solution #4406 is correct. Good work!

#4407. A man can row 6 kilometers per hour in still water. If the river is running at 1 kilometer per hour, it takes 90 minutes to row to a place and back. How far is the place?

#4408. A man rows at the rate of 10 kilometers per hour in still water and his rate against the current is 5 kilometers per hour, then what is the man's rate along the current?

---

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: 10 second questions

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: 48,422

Re: 10 second questions

Hi bobbym,

The solutions #4407 and #4408 are correct. Excellent!

#4409. Two pipes can fill a tank in 4 hours and 8 hours respectively while third pipe empties the full tank in 10 hours. If all the three pipes operate simultatiously, in how much time the tank would be filled?

#4410. A electric pump can fill a tank in 5/2 hours. Because of a leak in the tank, it took 4 1/2 hours to fill the tank. In what time would the leak drain out all the water of 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.