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## #2276 2012-11-08 20:46:05

bobbym
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### Re: Oral puzzles

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.

## #2277 2012-11-09 15:51:04

ganesh
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### Re: Oral puzzles

Hi bobbym,

The solution #1638 is perfect. Brilliant!

#1639. A can do a job in 9 days while B is twice as fast. In how many days would the same job done if they work together?

Character is who you are when no one is looking.

## #2278 2012-11-09 20:17:27

bobbym
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### Re: Oral puzzles

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.

## #2279 2012-11-10 01:33:34

anonimnystefy
Real Member

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### Re: Oral puzzles

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

## #2280 2012-11-10 16:27:47

ganesh
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### Re: Oral puzzles

Hi bobbym and anonimnystefy,

The solution #1639 is perfect. Good work!

#1640. If 20 workers can complete a task in 45 days, how many more workers would be required to complete it in 30 days?

Character is who you are when no one is looking.

## #2281 2012-11-10 20:51:26

bobbym
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### Re: Oral puzzles

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.

## #2282 2012-11-11 17:04:50

ganesh
Moderator

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### Re: Oral puzzles

Hi bobbym,

The solution #1640 is perfect. Neat work!

#1641. A is four times as good a workman as B and takes 12 days less to do a piece of work than B takes. In how many days B alone can do the whole work?

Character is who you are when no one is looking.

## #2283 2012-11-11 18:43:46

bobbym
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### Re: Oral puzzles

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.

## #2284 2012-11-12 17:36:27

ganesh
Moderator

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### Re: Oral puzzles

Hi bobbym,

The solution #1641 is correct. Neat work!

#1642. 25 men take 20 days to complete a certain work. 15 men left the work after some days. If the remaining work was completed in 37.5 days,   after how many days did 15 men leave the work?

Character is who you are when no one is looking.

## #2285 2012-11-12 22:58:44

bobbym
Administrator

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### Re: Oral puzzles

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.

## #2286 2012-11-14 15:32:15

ganesh
Moderator

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### Re: Oral puzzles

Hi bobbym,

The solution #1642 is perfect. Brilliant!

#1643. Find the prime factorization of the following numbers:
(a) 1152
(b) 1296
(c) 1440
(d) 1584
(e) 1728

Character is who you are when no one is looking.

## #2287 2012-11-14 17:03:02

bobbym
Administrator

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### Re: Oral puzzles

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.

## #2288 2012-11-15 16:37:30

ganesh
Moderator

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### Re: Oral puzzles

Hi bobbym,

The solutions (b), (c), and (d) are correct. Good work!

#1644. Given the Greatest Common Divisor (306, 657) = 9, find the Least Common Multiple (306, 657).

Character is who you are when no one is looking.

## #2289 2012-11-15 19:19:32

bobbym
Administrator

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### Re: Oral puzzles

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.

## #2290 2012-11-16 14:44:34

ganesh
Moderator

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### Re: Oral puzzles

Hi bobbym,

The solution #1644 is correct. Neat work!

#1645. Find the Least common multiple and Greatest common divisor of 35, 48, 56 by applying the prime factorization method.

Character is who you are when no one is looking.

## #2291 2012-11-16 19:24:28

bobbym
Administrator

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### Re: Oral puzzles

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.

## #2292 2012-11-17 19:13:50

ganesh
Moderator

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### Re: Oral puzzles

Hi bobbym,

The solution #1645 is perfect. Good work!

#1646. Solve : 4x - 3y - 8 = 0 and 6x - y - 29/3 = 0.

Character is who you are when no one is looking.

## #2293 2012-11-17 19:20:19

bobbym
Administrator

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### Re: Oral puzzles

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.

## #2294 2012-11-18 16:35:36

ganesh
Moderator

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### Re: Oral puzzles

Hi bobbym,

The solution #1646 is correct. Good work!

#1647. Solve : 4x + 7y = 20 and x - 13y = 21.

Character is who you are when no one is looking.

## #2295 2012-11-18 20:59:51

bobbym
Administrator

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### Re: Oral puzzles

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.

## #2296 2012-11-19 16:59:19

ganesh
Moderator

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### Re: Oral puzzles

Hi bobbym,

#1648. Solve : 4x + 6/y = 15 and x - 8/y = 14.

Character is who you are when no one is looking.

## #2297 2012-11-19 17:46:49

bobbym
Administrator

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### Re: Oral puzzles

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.

## #2298 2012-11-20 18:26:07

ganesh
Moderator

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### Re: Oral puzzles

Hi bobbym,

#1649. Solve : 5x + 3y = 70 and 3x - 7y = 60.

Character is who you are when no one is looking.

## #2299 2012-11-20 21:08:28

bobbym
Administrator

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### Re: Oral puzzles

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.

## #2300 2012-11-21 15:43:21

ganesh
Moderator

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### Re: Oral puzzles

Hi bobbym,

The solution #1648 is correct; my aplology.

The solution #1649 is perfect. Brilliant!

#1650. Solve : x/2 - y/5 = 4 and x/7 + y/15 = 3.

Character is who you are when no one is looking.

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