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#5551 2017-09-16 20:47:38

ganesh
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Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

The solution #3798 (two values) is correct. Excellent, Monox D. I-Fly!

#3799. The sum of two numbers is 18. The sum of their reciprocals is 1/4. Find the numbers.


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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#5552 2017-09-18 02:11:59

math9maniac
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Posts: 407

Re: Oral puzzles


Only a friend tells you your face is dirty.

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#5553 2017-09-18 12:32:40

ganesh
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Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

The solution #3799 is perfect. Excellent, math9maniac!

#3800. The sum of two numbers is 8 and 15 times the sum of their reciprocals is also 8. Find the numbers.


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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#5554 2017-09-20 16:07:14

ganesh
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Posts: 23,295

Re: Oral puzzles

Hi,

#3801. The product of two successive integral multiples of 5 is 300. Find the multiples.


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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#5555 2017-09-21 01:30:15

Monox D. I-Fly
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Registered: 2015-12-02
Posts: 857

Re: Oral puzzles

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#5556 2017-09-21 14:08:55

ganesh
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Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

Excellent, Monox D. I-Fly!

#3802. The speed of a boat in still water is 8 kilometers per hour. It can go 15 kilometer upstream and 22 kilometers downstream in 5 hours. Find the speed of the stream.


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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#5557 2017-09-24 01:00:50

ganesh
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Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

#3803. The diagonal of a rectangular field is 60 meters more than the shorter side. If the longer side is 30 meters more than the shorter side, find the sides of the field.


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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#5558 2017-09-26 02:47:36

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

#3804.The hypotenuse of a right triangle is 25 cm. The difference between the lengths of the other two sides of the triangle is 5 cm. Find the lengths of these sides.


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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#5559 2017-09-30 22:32:08

ganesh
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Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

#3805. The perimeter of a rectangular field is 82 cm and its area is 400 meters squared. Find the breadth of the rectangle.


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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#5560 2017-10-02 13:27:19

ganesh
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Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

#3806. The area of a right angled triangle 600 square centimeters. If the base of the triangle exceeds the altitude by 10 cm, find the dimensions of the triangle. (i.e. base and altitude).


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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#5561 2017-10-04 01:25:42

Monox D. I-Fly
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Posts: 857

Re: Oral puzzles

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#5562 2017-10-04 01:33:58

ganesh
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Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

The solution #3806 is correct. Neat work, Monox D. I-Fly!

#3807. The area of an isosceles triangle is 60 square centimeters and the length of each one of its equal sides is 13 cm. Find its base.


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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#5563 2017-10-04 01:38:50

Monox D. I-Fly
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Registered: 2015-12-02
Posts: 857

Re: Oral puzzles

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#5564 2017-10-04 02:53:20

ganesh
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Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

The solution #3807 is correct. Keep it up, Monox D. I-Fly!

#3808. The side of a square exceeds the side of another square by 4 cm and the sum of the areas of the two squares is 400 square centimeters. Find the dimensions of the squares.


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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#5565 2017-10-04 12:00:51

Monox D. I-Fly
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Registered: 2015-12-02
Posts: 857

Re: Oral puzzles

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#5566 2017-10-04 14:34:37

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

The solution #3808 (two parts) is correct. Excellent, Monox D. I-Fly!

#3809. Some students planned a holiday. The budget for food was $480. But eight of these failed to go and thus the cost of food for each member increased by $10. How many students went on the holiday?


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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#5567 2017-10-06 00:19:37

ganesh
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Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

#3810. The length of the sides forming right angle of a right angled triangle are 5x cm and (3x - 1) cm. If the area of the triangle is 60 square centimeters, find its hypotenuse.


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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#5568 2017-10-06 11:52:56

Monox D. I-Fly
Member
Registered: 2015-12-02
Posts: 857

Re: Oral puzzles

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#5569 2017-10-06 14:12:59

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

The solution #3810 is correct. Brilliant, Monox D. I-Fly!

#3811. A dealer sells an article for $24 and gains as much percent as the cost price of the article. Find the cost price of the article.


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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#5570 2017-10-06 23:07:00

Monox D. I-Fly
Member
Registered: 2015-12-02
Posts: 857

Re: Oral puzzles

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#5571 2017-10-07 01:00:37

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

The solution #3811 is correct. Excellent, Monox D. I-Fly!

#3812. If two pipes function simultaneously, a reservoir will be filled in 12 hours. One pipe fills the reservoir 10 hours faster than the other. How many hours will the second pipe take to fill the reservoir?


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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#5572 2017-10-08 16:20:49

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

#3813. If the list price of a toy is reduced by $2, a person can buy 2 more toys for $360. Find the original price of the toy.


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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#5573 2017-10-10 01:01:47

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

#3814. In a group of swans, 7/2 times the square root of the total number are playing on the share of a pond. The two remaining ones are swinging in water. Find the total number of swans.


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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#5574 2017-10-12 00:29:24

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

#3815. A bag contains 5 black, 7 red, and 3 white balls. A ball is drawn from the bag at random. Find the probability that the ball drawn is:
(i) red
(ii) black or white
(iii) not black


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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#5575 2017-10-13 10:48:15

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,295

Re: Oral puzzles

Hi,

#3816. What is the probability that a number selected from the numbers 1, 2, 3, ...., 15 is a multiple of 4?


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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