Problem solving Q'S

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
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Problem solving Q'S

by siddhartha123 » Wed Nov 16, 2011 10:24 pm
Hai ALL;

Can any one explain me below ; i encounterd during practice ;

1.) Last year a certain bond with face value 5000 yielded 8 % of its face value in interest. IF that interest was approximately 6.5 of bond selling price .what is the selling price?

a) 4063
b) 5325
c) 5351
d) 6000
e) 6154

[spoiler]OA : E[/spoiler]

2.) In a function f(a+b)=f(a)+f(b); for values a & b which of the following will satisfy?
a) f(x)=x^2
b) f(x)=x+1
c) f(x)=square root x
d) f(x)=2/x
e) f(x)=-3x

[spoiler]OA: E[/spoiler]

3.) There are three different percentage of fat, x gallons of 1% , y gallons of 2% and z gallons of 3 % , all these are added x+y+z to form 1.5 % fat ; then express the equation x in terms of y&z

[spoiler]OA:Y+3Z[/spoiler]
M.siddhartha
Source: — Quantitative Reasoning |

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by shankar.ashwin » Wed Nov 16, 2011 10:32 pm
5000 yields 8% interest (or) yields 400 stocks.

Now given this 400 is 6.5% of selling price (or) (6.5/100)*X = 400

X ~ 6154 E
siddhartha123 wrote: 1.) Last year a certain bond with face value 5000 yielded 8 % of its face value in interest. IF that interest was approximately 6.5 of bond selling price .what is the selling price?

a) 4063
b) 5325
c) 5351
d) 6000
e) 6154

[spoiler]OA : E[/spoiler]

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by shankar.ashwin » Wed Nov 16, 2011 10:40 pm
siddhartha123 wrote: 3.) There are three different percentage of fat, x gallons of 1% , y gallons of 2% and z gallons of 3 % , all these are added x+y+z to form 1.5 % fat ; then express the equation x in terms of y&z

[spoiler]OA:Y+3Z[/spoiler]
This one has been discussed several times in the forum. Easiest way is to know 1.5% can be formed using equal quantities of x(1%) and y(2%) with no z (or z=0)

Only x = y + 3z satisfies from the answer choice.. If you want a detailed explanation, refer https://www.beatthegmat.com/mba/2011/01/ ... c-problems

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by shankar.ashwin » Wed Nov 16, 2011 10:48 pm
siddhartha123 wrote: 2.) In a function f(a+b)=f(a)+f(b); for values a & b which of the following will satisfy?
a) f(x)=x^2
b) f(x)=x+1
c) f(x)=square root x
d) f(x)=2/x
e) f(x)=-3x

[spoiler]OA: E[/spoiler]
Pls refer here https://www.beatthegmat.com/my-first-fun ... tml#424313