Math Is Fun Forum

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: 48,423

Re: 10 second questions

Hi Arthur Bon Zavi and bobbym,

The solution #3349 is correct, Arthur Bon Zavi. Well done! (The solution #3348 is 20).

The solutions #3348 and #3349 are both correct, bobbym! Excellent!

#3350. Which is the prime number divisible by

?

#3351. The sum of two numbers is 40 nd their difference is 4. Find the ratio of these 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.

Arthur Bon Zavi

Member

Registered: 2011-10-30

Posts: 121

Re: 10 second questions

Hi Arthur Bon Zavi and bobbym,

The solution #3349 is correct, Arthur Bon Zavi. Well done! (The solution #3348 is 20).

The solutions #3348 and #3349 are both correct, bobbym! Excellent!

#3350. Which is the prime number divisible by

?

#3351. The sum of two numbers is 40 nd their difference is 4. Find the ratio of these numbers.

Oh ! Yes, I realise my mistake now for #3348.

---

In the heart of the night, when it's dark in the lights; I heard the loudest voice - a gun shot on the floor.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

Hi ganesh;

For 3350. If a number is divisible by

That means it is larger than that. Is that what you want?

---

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.

Arthur Bon Zavi

Member

Registered: 2011-10-30

Posts: 121

Re: 10 second questions

Hi ganesh;

For 3350. If a number is divisible by

That means it is larger than that. Is that what you want?

No. Just a prime number divisible by that sum. That's it.

---

In the heart of the night, when it's dark in the lights; I heard the loudest voice - a gun shot on the floor.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

That sum is a huge number. The prime to have that as a divisor must be larger.

For instance 32 has 2 as a divisor.

---

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.

Arthur Bon Zavi

Member

Registered: 2011-10-30

Posts: 121

Re: 10 second questions

That sum is a huge number. The prime to have that as a divisor must be larger.

For instance 32 has 2 as a divisor.

So if you want a small prime number, you have to make a guess.

---

In the heart of the night, when it's dark in the lights; I heard the loudest voice - a gun shot on the floor.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

A guess at what?

---

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.

Arthur Bon Zavi

Member

Registered: 2011-10-30

Posts: 121

Re: 10 second questions

A guess at what?

A guess at a prime number which is divisible by the sum provided, i.e. with a remainder as 0.

---

In the heart of the night, when it's dark in the lights; I heard the loudest voice - a gun shot on the floor.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

2,3 are all divisors of 6. You cannot say that 6 is a divisor of 2. You also can not say 6 is a divor of 1. 1 is a divisor of 6. A divisor is smaller or the same size as the number.

---

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.

Arthur Bon Zavi

Member

Registered: 2011-10-30

Posts: 121

Re: 10 second questions

2,3 are all divisors of 6. You cannot say that 6 is a divisor of 2. You also can not say 6 is a divor of 1. 1 is a divisor of 6. A divisor is smaller or the same size as the number.

When did I say that I disagree with this ?

---

In the heart of the night, when it's dark in the lights; I heard the loudest voice - a gun shot on the floor.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

By the same reasoning

is a huge number. For it to be the divisor of some number that number must be the same size or larger.

---

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.

Arthur Bon Zavi

Member

Registered: 2011-10-30

Posts: 121

Re: 10 second questions

By the same reasoning

is a huge number. For it to be the divisor of some number that number must be the same size or larger.

Yes. But the question states : Which is the prime number divisible by

.

Wait. There's a mistake in the question.

Last edited by Arthur Bon Zavi (2011-10-31 21:27:44)

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In the heart of the night, when it's dark in the lights; I heard the loudest voice - a gun shot on the floor.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

So it is larger to be divisible by that. In laymans terms that huge number goes into it.

---

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.

Arthur Bon Zavi

Member

Registered: 2011-10-30

Posts: 121

Re: 10 second questions

So it is larger to be divisible by that. In laymans terms that huge number goes into it.

And if that's a prime number which we are looking for, this sum cannot get divided by that prime number.

I understand what you say.

Last edited by Arthur Bon Zavi (2011-10-31 21:32:22)

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In the heart of the night, when it's dark in the lights; I heard the loudest voice - a gun shot on the floor.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

Actually, I hope ganesh can find the original answers. I will bring down mine.

---

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.

Arthur Bon Zavi

Member

Registered: 2011-10-30

Posts: 121

Re: 10 second questions

#3350. Which is the prime number divisible by

?

The actual answer is:

451937518566871396787294400495317155847

The addition isn't 425352958651173079329218259289710264320 ?

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In the heart of the night, when it's dark in the lights; I heard the loudest voice - a gun shot on the floor.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

No that is the next prime greater than that number.

Hi Arthur;

Bring down your answer so that ganesh can find it.

Hi ganesh;

For 3350. If a number is divisible by

That means it is larger than that. Is that what you want?

---

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.

Arthur Bon Zavi

Member

Registered: 2011-10-30

Posts: 121

Re: 10 second questions

---

In the heart of the night, when it's dark in the lights; I heard the loudest voice - a gun shot on the floor.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,423

Re: 10 second questions

Hi bobbym and Arthur Bon Zavi,

#3352. What is the reciprocal 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 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: 48,423

Re: 10 second questions

Hi bobbym,

The solution #3352 is perfect. Good work!

#3353. If

, find the value of P.

#3354. Find a four-digit perfect square number whose first two digits and last two digits taken separately also represent perfect square 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: 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: 48,423

Re: 10 second questions

Hi bobbym,

The solutions #3353 and #3354 are correct. Good work!

#3355.

#3356. The average marks of 48 students in a class is 45. The average marks of the boys in the class is 40 and the average marks of the girls in the class is 50. What is the ratio of the boys and the girls in the same class?

---

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.