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## #901 2016-12-21 01:21:28

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Compute the solution:

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.

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## #902 2016-12-21 16:46:16

ganesh
Registered: 2005-06-28
Posts: 23,429

### Re: Compute the solution:

Hi;

The solution 551 is correct. Excellent, bobbym!

552. The line joining the points (2,1) and (5,-8) is trisected at the points P and Q. If the point P lies on the line 2x - y + k = 0, find the value of k.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

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

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## #903 2016-12-21 16:56:25

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Compute the solution:

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.

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## #904 2016-12-21 22:27:13

ganesh
Registered: 2005-06-28
Posts: 23,429

### Re: Compute the solution:

Hi;

The solution 552 is correct. Brilliant, bobbym!

553. The digits of a positive number, having three digits, are in an Arithmetic Progression and their sum is 15. The number obtained by reversing the digits is 594 less than the original number. Find the number.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

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

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## #905 2016-12-22 04:37:55

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Compute the solution:

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.

Offline

## #906 2016-12-22 17:44:49

ganesh
Registered: 2005-06-28
Posts: 23,429

### Re: Compute the solution:

Hi;

The solution 553 is correct. Excellent, bobbym!

554. Find the lengths of the medians of a triangle ABC whose vertices are A(-1,3), B(1,-1), and C(5,1). Also, find the coordinates of the centroid of the triangle ABC.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

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

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## #907 2016-12-22 20:27:51

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Compute the solution:

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.

Offline

## #908 2016-12-25 17:21:42

ganesh
Registered: 2005-06-28
Posts: 23,429

### Re: Compute the solution:

Hi;

The solution 554 is correct. Magnificent, bobbym!

555. Solve:

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

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

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## #909 2016-12-25 20:35:39

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Compute the solution:

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.

Offline

## #910 2016-12-26 17:54:22

ganesh
Registered: 2005-06-28
Posts: 23,429

### Re: Compute the solution:

Hi;

The solution 555 is correct. Excellent, bobbym!

556. (a) If sin (A - B) = 1/2 and cos (A + B) = 1/2, then find A and B.

556. (b) If cos (A + B) = 0 and sin (A - B) = 1/2, then find A and B.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

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

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## #911 2016-12-26 18:15:47

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Compute the solution:

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.

Offline

## #912 2016-12-27 19:06:04

ganesh
Registered: 2005-06-28
Posts: 23,429

### Re: Compute the solution:

Hi;

The solution 556 (four parts) is correct. Excellent, bobbym!

557. Three unbiased coins are thrown simultaneously. Find the probability of getting
a) 3 tails
b) 2 tails
c) no tails
d) 2 heads and 1 tail

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

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

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## #913 2016-12-28 07:48:18

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Compute the solution:

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.

Offline

## #914 2016-12-28 22:26:31

ganesh
Registered: 2005-06-28
Posts: 23,429

### Re: Compute the solution:

Hi;

The solution 557 (five parts) is correct. Excellent, bobbym!

558. A metallic sphere of radius 10.5 cm is melted and then recast into small cones, each of radius 3.5 cm and height 3 cm. Find how many such cones are obtained.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

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

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## #915 2016-12-28 22:50:02

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Compute the solution:

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.

Offline

## #916 2016-12-29 16:53:55

ganesh
Registered: 2005-06-28
Posts: 23,429

### Re: Compute the solution:

Hi;

The solution 558 is correct. Excellent, bobbym!

559. If

divides
exactly, find a and b.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

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

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## #917 2016-12-29 17:06:29

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Compute the solution:

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.

Offline

## #918 2016-12-30 17:52:26

ganesh
Registered: 2005-06-28
Posts: 23,429

### Re: Compute the solution:

Hi;

The solution 559 is correct. Excellent, bobbym!

560. A cylindrical jar of radius 6 cm contains oil. Iron sphere each of radius 1.5 cm are immersed in oil. How many spheres are necessary to raise the level of the oil in centimeters?

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

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

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## #919 2016-12-30 20:12:25

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Compute the solution:

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.

Offline

## #920 2016-12-30 21:13:39

ganesh
Registered: 2005-06-28
Posts: 23,429

### Re: Compute the solution:

Hi;

I think the problem is ambiguous. Regretted. I have posted a fresh problem.

560 a. Name the type of quadrilateral formed, if any, by the following points, and give reasons for your answer.

(4,5), (7,6), (4,3), and (1,2).

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

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

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## #921 2016-12-31 06:15:05

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Compute the solution:

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.

Offline

## #922 2017-01-31 17:06:11

ganesh
Registered: 2005-06-28
Posts: 23,429

### Re: Compute the solution:

Hi;

The solution 560 is correct. Excellent, bobbym!

561. From a group of 2 boys and 3 girls, two children are selected at random. Find the probability of
(i) both selected children are are girls.
(ii) the selected group consists of one boy and one girl.
(iii) at least one boy is selected.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

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

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## #923 2017-01-31 17:35:48

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Compute the solution:

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.

Offline

## #924 2017-02-01 17:57:43

ganesh
Registered: 2005-06-28
Posts: 23,429

### Re: Compute the solution:

Hi;

The solution 561 is correct. Excellent, bobbym!

562. From the top of a building 60 m high, the angles of depression of the top and bottom of a vertical lamp post are observed to be 30 degrees and 60 degrees respectively. Find
(i) the horizontal distance between the building and the lamp post.
(ii) the height of the lamp post.
Take

.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

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

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## #925 2017-02-01 21:48:40

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Compute the solution:

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.

Offline