Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

## #4051 2012-07-29 21:56:40

anonimnystefy
Real Member

Offline

### 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
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #4052 2012-07-30 20:53:47

ganesh
Moderator

Offline

### Re: 10 second questions

Hi bobbym and anonimnystefy,

The solutions #4221 and #4222 are correct. Excellent!

#4223. A can do a piece of work in 20 days and B can do it in 30 days. How long would they take to do it working together?

#4224. A an do a piece of work in 6 days. A and B together can do the work in 4 days. How long would it take B to finish the work?

Character is who you are when no one is looking.

## #4053 2012-07-30 21:10:15

bobbym

Offline

### Re: 10 second questions

Hi;

In mathematics, you don't understand things. You just get used to them.
Some cause happiness wherever they go; others, whenever they go.
If you can not overcome with talent...overcome with effort.

## #4054 2012-07-30 22:04:47

anonimnystefy
Real Member

Offline

### 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
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #4055 2012-07-31 21:35:21

ganesh
Moderator

Offline

### Re: 10 second questions

Hi bobbym and anonimnystefy,

The solutions #4223 and #4224 are correct. Neat work!

#4225. A and B together can reap a field in 10 hours, but by himself B requires 15 hours. How long would A take to reap the same field?

#4226. A and B can do a piece of work in 18 days, B and C in 24 days, and A & C in 36 days. In what time would they do it all working together?

Character is who you are when no one is looking.

## #4056 2012-07-31 22:08:46

anonimnystefy
Real Member

Offline

### 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
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #4057 2012-07-31 23:59:29

bobbym

Offline

### Re: 10 second questions

Hi ganesh;

In mathematics, you don't understand things. You just get used to them.
Some cause happiness wherever they go; others, whenever they go.
If you can not overcome with talent...overcome with effort.

## #4058 2012-08-01 20:38:50

ganesh
Moderator

Offline

### Re: 10 second questions

Hi anonimnystefy and bobbym,

The solutions #4225 and #4226 are correct. Excellent!

#4227. A train running at the average speed of 45 kilometers per hour passes an electric pole in 10 seconds. Find the length of the train.

#4228. Length of the train is 500 meters. If the speed is 60 kilometers per hour, then find the time to cross a pole.

Character is who you are when no one is looking.

## #4059 2012-08-01 20:46:35

bobbym

Offline

### Re: 10 second questions

Hi ganesh;

In mathematics, you don't understand things. You just get used to them.
Some cause happiness wherever they go; others, whenever they go.
If you can not overcome with talent...overcome with effort.

## #4060 2012-08-01 21:44:44

anonimnystefy
Real Member

Offline

### Re: 10 second questions

Hi ganesh

And congrats on 10000 posts.

Last edited by anonimnystefy (2012-08-01 21:56:09)

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
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #4061 2012-08-02 17:35:59

Denominator
Full Member

Offline

### Re: 10 second questions

Hello!

I don't like trains >_<

## #4062 2012-08-02 22:38:40

ganesh
Moderator

Offline

### Re: 10 second questions

Hi bobbym, anonimnystefy, and Denominator,

The solutions #4227 and #4228 are correct. Neat job! (Denominator, the solution #4227 is 125 meters, not 1250 meters).

Thanks a lot, anonimnystefy (On 10,000 posts)!

#4229. A cistern can be filled by tap A in 4 hours and B in 3 hours. How long would it take to fill if both taps are opened together?

#4230. Pipe A can fill a tank in 5 hours, pipe B in 10 hours, and C in 30 hours. If all the pipes are open, in how many hours would the tank be filled?

Character is who you are when no one is looking.

## #4063 2012-08-02 23:03:53

bobbym

Offline

### Re: 10 second questions

Hi;

In mathematics, you don't understand things. You just get used to them.
Some cause happiness wherever they go; others, whenever they go.
If you can not overcome with talent...overcome with effort.

## #4064 2012-08-02 23:20:33

anonimnystefy
Real Member

Offline

### 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
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #4065 2012-08-03 22:56:18

ganesh
Moderator

Offline

### Re: 10 second questions

Hi bobbym and anonimnystefy,

The solutions #4229 and #4230 are correct. Good work!

#4231. Find the Simple Interest on \$1500 for 3 years at 10% per annum.

#4232. At what rate per annum would \$5200 earn \$624 in 2 years?

Character is who you are when no one is looking.

## #4066 2012-08-04 00:12:35

bobbym

Offline

### Re: 10 second questions

Hi;

In mathematics, you don't understand things. You just get used to them.
Some cause happiness wherever they go; others, whenever they go.
If you can not overcome with talent...overcome with effort.

## #4067 2012-08-04 13:57:49

Denominator
Full Member

Offline

### Re: 10 second questions

Hey

Yeah I must have added an extra zero in my working somewhere XD, sorry!

Last edited by Denominator (2012-08-04 13:58:53)

## #4068 2012-08-06 21:49:11

ganesh
Moderator

Offline

### Re: 10 second questions

Hi bobbym and Denominator,

bobbym : The solution #4231

Denominator : All correct. Outstanding!

#4233. Find the missing figures. ?% of 25 = 2.125

#4234. Find the missing figures. 9% of ? = 63

Character is who you are when no one is looking.

## #4069 2012-08-06 23:03:29

bobbym

Offline

### Re: 10 second questions

Hi;

In mathematics, you don't understand things. You just get used to them.
Some cause happiness wherever they go; others, whenever they go.
If you can not overcome with talent...overcome with effort.

Denominator
Full Member

Offline

Hey ganesh

## #4071 2012-08-08 22:05:34

ganesh
Moderator

Offline

### Re: 10 second questions

Hi bobbym and Denominator,

The solutions #4233 and #4234 are correct. Neat job!

#4235. Which is greatest in 16 2/3%, 2/15, and 0.17?

#4236. A inspector rejects 0.08% of the meters as defective. How many will he examine to reject 2?

Character is who you are when no one is looking.

## #4072 2012-08-08 22:14:52

bobbym

Offline

### Re: 10 second questions

Hi;

In mathematics, you don't understand things. You just get used to them.
Some cause happiness wherever they go; others, whenever they go.
If you can not overcome with talent...overcome with effort.

Denominator
Full Member

Offline

Hi ganesh,

## #4074 2012-08-09 21:10:43

ganesh
Moderator

Offline

### Re: 10 second questions

Hi bobbym and Denominator,

Both the solutions #4235 and #4236 are perfect, bobbym! Good work!

Denominator, the solution #4235 is correct. Well done!

#4237. 88% of 370 + 24% of 210 - ? = 118

#4238. 860% of 50 + 50% of 860 = ?

Character is who you are when no one is looking.

## #4075 2012-08-10 00:21:26

bobbym

Offline

### Re: 10 second questions

Hi ganesh;

In mathematics, you don't understand things. You just get used to them.
Some cause happiness wherever they go; others, whenever they go.
If you can not overcome with talent...overcome with effort.