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## #4376 2012-12-20 17:39:40

ganesh
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### Re: 10 second questions

Hi bobbym,

The solutions #4488 and #4489 are correct. Superlative!

#4490. Find k, if the given value is the kth term of the given Arithmetic Progression : -1, -3, -5, -7 ...... x = -151.

#4491. Find a30 - a20 for the Arithmetic Progression : -9, -14, -19, -24, ........

Character is who you are when no one is looking.

## #4377 2012-12-20 19:25:32

bobbym

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### Re: 10 second questions

Hi;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #4378 2012-12-21 17:40:50

ganesh
Moderator

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### Re: 10 second questions

Hi bobbym,

The solutions #4490 and #4491 are correct. Neat work!

#4492. Two Arithmetic Progressions have the same common difference. The first term of one of these is 3, and that of the other is 8. What is the difference between their 2nd terms?

#4493. Two A.P.s have the same common difference. The first term of one of these is -1, and that of the other is -3. What is difference between their second term?

Character is who you are when no one is looking.

## #4379 2012-12-21 20:11:01

anonimnystefy
Real Member

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### Re: 10 second questions

Hi ganesh

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón

## #4380 2012-12-21 20:38:53

bobbym

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### Re: 10 second questions

Hi;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #4381 2012-12-21 22:51:07

ganesh
Moderator

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### Re: 10 second questions

Hi anonimnystefy and bobbym,

The solutions #4492 and #4493 are correct. Well done!

#4494. Find the sum : 2 + 4 + 6 + ....... + 200.

#4495. nth term of a sequence is a + nb. Find a4 - a3.

Character is who you are when no one is looking.

## #4382 2012-12-21 23:05:19

bobbym

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### Re: 10 second questions

Hi;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #4383 2012-12-22 05:39:51

anonimnystefy
Real Member

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### Re: 10 second questions

Hi ganesh

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón

## #4384 2012-12-22 17:46:45

ganesh
Moderator

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### Re: 10 second questions

Hi bobbym and anonimnystefy,

The solutions #4494 and #4495 are correct. Neat job!

#4496. How many two-digit numbers are divisible by 3?

#4497. Find the 11th term from the last term of the Arithmetic Progression : 10, 7, 4, ........, -62.

Character is who you are when no one is looking.

## #4385 2012-12-23 03:16:21

bobbym

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### Re: 10 second questions

Hi;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #4386 2012-12-23 18:14:23

ganesh
Moderator

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### Re: 10 second questions

Hi bobbym,

The solution #4496 is correct. Good work!

The solution #4497

#4498. For what value of n, are the nth terms of two Arithmetic Progressions : 63, 65, 67, .... and 3, 10, 17, .... equal?

#4499. If a = 7, d = 3, n = 8, find an.

Character is who you are when no one is looking.

## #4387 2012-12-23 18:15:35

julianthemath
Super Member

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### Re: 10 second questions

Buy 1 for \$1, for \$0.50, for \$3, for \$2.50, for \$1.25, for \$0.25, and for \$5.

## #4388 2012-12-23 20:50:33

anonimnystefy
Real Member

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### Re: 10 second questions

Hi ganesh

Last edited by anonimnystefy (2012-12-23 22:17:22)

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón

## #4389 2012-12-23 21:05:21

bobbym

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### Re: 10 second questions

Hi;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #4390 2012-12-24 17:44:07

ganesh
Moderator

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### Re: 10 second questions

Hi,

The solutions #4496 and #4497 are

, julianthemath.

The solutions #4498 and #4499 are correct. Excellent, anonimnystefy and bobbym!

#4500. If d = -3, n = 18, an = -5, find a.

#4501. If a = -18.9, d = 2.5, an = 3.6, find n.

Character is who you are when no one is looking.

## #4391 2012-12-24 18:28:07

bobbym

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### Re: 10 second questions

Hi ganesh;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #4392 2012-12-25 18:08:00

ganesh
Moderator

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### Re: 10 second questions

Hi bobbym,

The solutions #4500 and #4501 are correct. Neat job!

#4502. If 6 times the 6th term of an Arithmetic Progression is equal 7 times the 7th term, then what is the 13th term of the A.P.?

#4503. If pth, qth, and rth terms of an Arithmetic Progression are a, b, c respectively, then a(q-r) + b(r-p) + c(p-q) = ?

Character is who you are when no one is looking.

## #4393 2012-12-25 21:12:01

bobbym

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### Re: 10 second questions

Hi;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #4394 2012-12-26 17:32:19

ganesh
Moderator

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### Re: 10 second questions

Hi bobbym,

The solutions #4502 and #4503 are correct. Neat work!

#4504. In an Arithmetic Progression, if l = 28, S = 144, n = 9, find a.

#4505. In an Arithmetic Progression, if a = 3, n = 8, S = 192, find d.

Character is who you are when no one is looking.

## #4395 2012-12-26 20:37:41

anonimnystefy
Real Member

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### Re: 10 second questions

Hi ganesh

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón

## #4396 2012-12-26 21:10:42

bobbym

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### Re: 10 second questions

Hi;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #4397 2012-12-27 18:23:08

ganesh
Moderator

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### Re: 10 second questions

Hi anonimnystefy and bobbym,

The solutions #4504 and #4505

In triangle ABC, right angled at B, AB = 24 cm, BC = 7 cm. Determine:

#4506. sin A, cos A.

#4507. sin C, cos C.

Character is who you are when no one is looking.

## #4398 2012-12-27 20:23:55

bobbym

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### Re: 10 second questions

Hi;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.

## #4399 2012-12-28 18:04:23

ganesh
Moderator

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### Re: 10 second questions

Hi bobbym,

The solutions #4506 and #4507 are correct. Good work!

If sin A = 3/4, calculate

#4508. cos A

#4509. tan A.

Character is who you are when no one is looking.

## #4400 2012-12-29 07:07:49

bobbym

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### Re: 10 second questions

Hi;

In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.