Math Is Fun Forum

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: 48,394

Re: 10 second questions

Hi bobbym,

The solutions to 2510 and 2511 are perfect. Superlative!

---

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;

How are you doing?

---

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: 48,394

Re: 10 second questions

Hi bobbym,

I am finding difficulty in the forum now!

---

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;

What is the problem? Something I can do for you?

---

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: 48,394

Re: 10 second questions

Hi bobbym,

Its got to connectivity. I think I may manage.

---

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,394

Re: 10 second questions

Hi bobbym,

#2512. A man saved $16,500 in ten years. In each year after the first, he saved $100 more than he did in the preceding year. How much did he save in the first year?

---

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,394

Re: 10 second questions

#2513. The height and radius of a cone are equal. The volume of the cone is 35 cc. Find the volume of the sphere whose radius is equal to the height of the cone.

---

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: 48,394

Re: 10 second questions

Hi bobbym,

The solution to 2513 is correct. Good work!

#2514. Find the quotient and the remainder when

is divided by (x - 3).

#2515. Solve the quadratic equation: 2x[sup]2[/sup] + 5x - 25 = 0.

---

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: 48,394

Re: 10 second questions

Hi bobbym,

The solutions to 2514 and 2515 are perfect! Brilliant!

#2516. The sum to n terms of a certain series is given by 2n[sup]2[/sup] - 3n. Show that the series is an Arithmetic Progression.

#2517. Find the value of k for which the given equation 9x[sup]2[/sup] + 3kx + 4 = 0 has real and equal roots.

---

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: 48,394

Re: 10 second questions

Hi bobbym,

The solution to 2516 is perfect. The solution to 2517 is k equal to plus or minus 4.
Excellent!

#2518. The inner and outer radii of a hollow cylinder are 8 cm and 10 cm respectively. If its outer surface area is 440 sq.cm., find its inner surface area.

#2519. If the polynomials ax[sup]3[/sup] + 4x[sup]2[/sup] + 3x - 4 and x[sup]3[/sup] - 4x + a leaves the same remainder when
divided by (x - 3), find the value of a.

---

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: 48,394

Re: 10 second questions

Hi bobbym,

The solutions to 2518 and 2519 are perfect. Excellent!

#2520. The sum of an infinite series in Geometric Progression is 57 and the sum of their cubes is 9747. Find the series.

#2521. Find the 4 numbers in Arithmetic Progression whose sum is 20 and the sum of whose squares is 120.

---

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: 48,394

Re: 10 second questions

Hi bobbym,

The solutions 2520 and 2521 are perfect. Fantastic!

#2522. Find the value of

.

#2523. Find the sum of all the three digit numbers which are divisible by 9.

---

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: 48,394

Re: 10 second questions

Hi bobbym,

The solution to 2522 is (x - 1). The solution to 2523 is correct. Good work!

#2524. Find the remainder when

is divided by 2x + 1.

#2525. Find the Greatest Common Divisor of

and

.

---

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: 48,394

Re: 10 second questions

Hi bobbym,

The solution to 2524 is 63/8. The solution to 2525 is perfect. Well done!

The solution to 2522 is (x - 1)[sup]2[/sup]. I apologize.

#2526. Determine the value of a such that (a,a), (2,3), and (4,-1) are collinear.

#2527. Write down the equation of a line parallel to 3x - 4y - 5 = 0 and passing through the point (2,3).

---

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;

You are correct on #2524 looking my work over, I had a sign wrong sorry. Back to the problems.

---

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: 48,394

Re: 10 second questions

Hi bobbym,

The solutions to 2526 and 2527 are correct. Well done!

#2528. A perfect die is tossed twice. Find the probability of getting a total of 9.

#2529. Find the Standard Deviation of the first five natural 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 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.