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**NullRoot****Member**- Registered: 2007-11-19
- Posts: 162

If you have two numbers, A and B, then the percentage of B that is represented by A is: (A/B)*100

If the price of 12 pencils is x, and 1x is the profit he makes from 8x, then the percentage percentage profit is:

(1x/8x)*100

By rules of multiplication, 1x/8x = (1/8)*(x/x) = (1/8)*(1) = 1/8

So, his percentage profit is: (1/8)*100 = (0.125)*100 = 12.5%

Trillian: Five to one against and falling. Four to one against and falling Three to one, two, one. Probability factor of one to one. We have normality. I repeat, we have normality. Anything you still cant cope with is therefore your own problem.

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**ganesh****Moderator**- Registered: 2005-06-28
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#426.The factorial of a number is always less than

. True or false?#427. If the sum of internal angles of a polygon is 720° , what is the name of the polygon?

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**JohnnyReinB****Member**- Registered: 2007-10-08
- Posts: 453

*"There is not a difference between an in-law and an outlaw, except maybe that an outlaw is wanted" *

Nisi Quam Primum, Nequequam

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**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 13,906

Correct, JohnnyReinB,

[color=ff0099]**Well done!**[/color]

#428. If x+y=7 and xy=12, what is the value of x² +y² ?

#429. If x^(1/3)+y^(1/3)+z^(1/3)=0, then x+y+z=3xyz, True or False?

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**JohnnyReinB****Member**- Registered: 2007-10-08
- Posts: 453

Have we Plutoins no hope?

*Last edited by JohnnyReinB (2007-12-07 15:03:31)*

*"There is not a difference between an in-law and an outlaw, except maybe that an outlaw is wanted" *

Nisi Quam Primum, Nequequam

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**pi man****Member**- Registered: 2006-07-06
- Posts: 251

Quote from JohnnyReinB: "What happens if you raise a number to a fraction?"

x ^ (1/2) is the square root of X

x ^ (1/3) is the cube root of X

.

.

.

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**ganesh****Moderator**- Registered: 2005-06-28
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#430. What is the side total of a magic square containing numbers from 1 to 49?

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**TheDude****Member**- Registered: 2007-10-23
- Posts: 361

Wrap it in bacon

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**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 13,906

**Well done, TheDude, All answers correct!!!**

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**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 13,906

#431. If x=y=2z and xyz=256 then what is the value of x?

#432. Pipe A can fill in 20 minutes and Pipe B in 30 mins and Pipe C can empty the same in 40 mins.If all of them work together, find the time taken to fill the tank.

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**JohnnyReinB****Member**- Registered: 2007-10-08
- Posts: 453

*"There is not a difference between an in-law and an outlaw, except maybe that an outlaw is wanted" *

Nisi Quam Primum, Nequequam

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**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 13,906

**Excellent, JohnnyReinB!!! All correct!!!**

#433. Solve for x.

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**NullRoot****Member**- Registered: 2007-11-19
- Posts: 162

Trillian: Five to one against and falling. Four to one against and falling Three to one, two, one. Probability factor of one to one. We have normality. I repeat, we have normality. Anything you still cant cope with is therefore your own problem.

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**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 13,906

Solution to #433.**Well done, NullRoot! You are correct!!!**

#434. What is (a-x)(b-x)(c-x).......(z-x)?

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**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 13,906

#435. Solve

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**JohnnyReinB****Member**- Registered: 2007-10-08
- Posts: 453

what do you mean by solving it?

*"There is not a difference between an in-law and an outlaw, except maybe that an outlaw is wanted" *

Nisi Quam Primum, Nequequam

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**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 13,906

Solve for x, that is get x in terms of a and b.

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**JohnnyReinB****Member**- Registered: 2007-10-08
- Posts: 453

ok.

*"There is not a difference between an in-law and an outlaw, except maybe that an outlaw is wanted" *

Nisi Quam Primum, Nequequam

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**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 13,906

No, you are not correct!

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**TheDude****Member**- Registered: 2007-10-23
- Posts: 361

Wrap it in bacon

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**ganesh****Moderator**- Registered: 2005-06-28
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**Excellent, TheDude!!!Keep it up!!!**

Character is who you are when no one is looking.

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**ganesh****Moderator**- Registered: 2005-06-28
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436. If the operation,^ is defined by the equation x ^ y = 2x + y, what is the value of a in

2 ^ a = a ^ 3?

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**ganesh****Moderator**- Registered: 2005-06-28
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437. A right circular cylinder and a sphere have the same volume and same radius. What is the ratio of their curved surfaces?

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**ganesh****Moderator**- Registered: 2005-06-28
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438. What is the value of

(a) log 5

(b) -log 2

(c) 2 log 3

(d) 2 log 2

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**NullRoot****Member**- Registered: 2007-11-19
- Posts: 162

Trillian: Five to one against and falling. Four to one against and falling Three to one, two, one. Probability factor of one to one. We have normality. I repeat, we have normality. Anything you still cant cope with is therefore your own problem.

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