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#2426 2011-05-29 16:55:36

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 46,762

Re: 10 second questions

Hi bobbym and anonimnystefy,

Well done, anonimnystefy!

#2933. A total of 324 coins of 25 paise and 20 paise make a sum of Rs.71. (One Rupee = 100 paise) Find the number of 25 paise coins.

#2934. The price of 10 chairs is equal to that of 4 tables. The price of 15 chairs and 2 tables together is $4000. Find the total price of 12 chairs and 3 tables.

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.

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#2427 2011-05-29 17:35:55

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.

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#2428 2011-05-29 18:16:30

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 46,762

Re: 10 second questions

Hi bobbym,

The solutions 2933 and 2934 are correct. Excellent!

#2935.

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.

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#2429 2011-05-29 18:37:18

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.

Offline

#2430 2011-05-30 07:38:36

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,049

Re: 10 second questions

hi ganesh

Last edited by anonimnystefy (2011-05-30 07:39:19)

“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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#2431 2011-05-30 16:39:31

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 46,762

Re: 10 second questions

Hi bobbym and anonimnystefy,

The solution 2935 is perfect! Brilliant work!

#2936. Worker A takes 8 hours to do a job. Worker B takes 10 hours to do the same job. How long would it take both A and B, working together but independently, to do the same job?

#2937. A and B together can complete a piece of work in 4 days. If A alone can complete the same work in 12 days, in how many days can B alone complete that work?

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.

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#2432 2011-05-30 16:49:45

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.

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#2433 2011-05-31 00:36:17

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 46,762

Re: 10 second questions

Hi bobbym,

The solutions 2936 and 2937 are perfect. Awesome!

#2938. In a simultaneous throw of a pair of dice, find the probability of getting a total more than 7.

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.

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#2434 2011-05-31 04:59:43

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,049

Re: 10 second questions

hi ganesh

“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

Offline

#2435 2011-05-31 09:29:22

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.

Offline

#2436 2011-05-31 16:37:06

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 46,762

Re: 10 second questions

Hi anonimnystefy and bobbym,

The solution 2938 is correct. Good work!

#2939. A bag contains 6 white and 4 black balls. Two balls are drawn at random. Find the probability that they are of the same color.

#2940. Two dice are thrown together. What is the probability that the sum of the numbers on the two faces is divisible by 4 or 6?

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.

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#2437 2011-05-31 16:52:51

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.

Offline

#2438 2011-05-31 18:07:41

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 46,762

Re: 10 second questions

Hi bobbym,

The solution 2940 is correct. Well done!

Regarding 2939, I get P(E) = 7 / 15.

#2941. Two unbiased coins are tossed. What is the probability of getting at most 1 head?

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.

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#2439 2011-05-31 18:24:38

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

Re: 10 second questions

Hi ganesh;

I am getting for 2940:

P(12) = 1 / 36
P(8) = 5 / 36
P(6) = 5 / 36
P(4) = 1 / 12

How do you get 7 / 15? What am I doing wrong?



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

#2440 2011-05-31 19:53:26

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 46,762

Re: 10 second questions

Hi bobbym,

The solution 2941 is perfect. Well done!
Further, the solution 2940 being 7/18 is perfect.

However, the solution 2939 I get is:


#2942. Three unbiased coins are tossed. What is the probability of getting at most two heads?

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.

Offline

#2441 2011-05-31 20:30:24

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

Re: 10 second questions

Hi ganesh;

You are correct about 2939. Very good!

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

#2442 2011-05-31 21:19:41

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 46,762

Re: 10 second questions

Hi bobbym,

The solution 2942 is correct. Well done!

#2943.

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.

Offline

#2443 2011-05-31 23:35:33

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.

Offline

#2444 2011-06-01 01:17:06

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 46,762

Re: 10 second questions

Hi bobbym,

The solution 2943 is perfect. Superlative!

#2944. If a + b = 5 and 3a + 2b = 20, then what would (3a + b) equal to?

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.

Offline

#2445 2011-06-01 01:26:08

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.

Offline

#2446 2011-06-01 16:03:37

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 46,762

Re: 10 second questions

Hi bobbym,

The solution 2944 is correct. Well done!

#2945. What is the sum of the first 45 natural numbers (1 to 45)?

#2946.

n terms = ?

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.

Offline

#2447 2011-06-01 17:02:22

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.

Offline

#2448 2011-06-01 18:37:39

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 46,762

Re: 10 second questions

Hi bobbym,

The solutions 2945 and 2946 are correct. Brilliant performance!

#2946. The difference of two numbers is 1365. On dividing the larger number by the smaller, you get 6 as quotient and 15 as remainder. What is the smaller number?

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.

Offline

#2449 2011-06-01 19:49:19

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.

Offline

#2450 2011-06-01 21:23:57

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 46,762

Re: 10 second questions

Hi bobbym,

The solution 2946 is perfect. Well done!

#2947. Find the smallest 5-digit number exactly divisible by 41.

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.

Offline

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