CAT 2008: Quantitative Questions a Day 1 to 50 - The discussions

rajeev_hts · 03:04 PM

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Quantitative Question # 052
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Nbangalorekar bought a 10 kg of water-melon in Bangalore that had 99% water. After the water-melon was left outdoors for a day, it was 95% water. What was the weight of the dehydrated water-melon?

(1) 9.6 kg (2) 9.5 kg (3) 2 kg (4) can not be determined (5) none of these

Total solid= 1%of 10kg=0.1 Kg
let x Kg is water left after dehydration
then (x+0.1)*0.95=x
x=1.9
total wt = 1.9+0.1=2Kg

Op(3)

sameerkalra86

2)
Hey atom, if we jst try to expand it ....

(1*2*3)*(1*2*3*4*5)*(1*2*3*4*5*6*7)

We can see that first two products (3!*5!) comes out to be 8*9*10

So...

= (8*9*10)*(1*2*3*4*5*6*7) = 10!

asifn

hi Rajeev..well brother gr8 work but i m still unable to understand about the logic ..i mean how to approach ..could u plz explain it in a more better way..i guess except u none has solved this ...cheers

avenger007

hei...I can't understand the concept of no: of steps taken in an escalator..plz help me wid dis,
(speed of a person/speed of escalator) = (no: of steps on moving escalator / no: of steps of the person when escalator is off)

cld any one plz explain the concept..?

lsrgandhi

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Quantitative Question # 088
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If f(x) = x^2 - 2x then for how many distinct real α is f(f(f(f(α)))) = 3?

(1) 3 (2) 6 (3) 5 (4) 9 (5) none of these

Answer for this is (4) 9

Solution:
From the outermost 'f' we find the distinct values of 'x' for which f(x)=3. For this we have x=3 or -1.

Now for second 'f' we find out distinct 'x' such that f(x)=3 and f(x)=-1.

Continuing in this way, we get the following 9 distinct and real values of 'x' satisfying f(f(f(f(x)))) = 3:
3, -1, 1,
1+2^(1/2),
1-2^(1/2),
1+(2+2^(1/2))^(1/2),
1-(2+2^(1/2))^(1/2),
1+(2-2^(1/2))^(1/2),
1-(2-2^(1/2))^(1/2).

madhuji

just wanted to ask you guys something . I have done the basics of almost all the chapters but still I am unable to perform in aimcats I am able to attempt only 5-6 questions in 45 minutes in the paper and I miss out on easy question I mean I fail to recognise them too I am able to have a look at all the questions though even if I identify them I get stuck in some question and eventually I end up attempting just 5-6 questions please guide me how should I go about the quant section to maximise my score.

ashishsharma17

Quote:

Originally Posted by Aarav

Hello All,

We will start QQAD from tomorrow. Since the software takes approximately 30 minutes to deliver the NL - the time by which you will receive the NL daily would be between 0630 and 0700 Hours daily.

Whoever is earliest on the thread - please post the problem of the day first before writing the solution.

Hope each one of you learn as much from one another and the discussions turn out to be very fruitful and enriching.

Enjoy the QQAD experience

Good Luck!

thanks aarav,ur q's r really good

megs0211

can n e plzzz solve dis....

The currency ‘Tiso’ is available in three denominational notes: 10 Tisos, 20 Tisos and 100 Tisos. In how many ways can a bill of 290 Tisos be paid?

shivam_01

Quote:

Originally Posted by megs0211

can n e plzzz solve dis....

The currency ‘Tiso’ is available in three denominational notes: 10 Tisos, 20 Tisos and 100 Tisos. In how many ways can a bill of 290 Tisos be paid?

Hi megha welcome to PG

Check the solution at this
http://www.pagalguy.com/forum/quanti...at08-1018.html (official quant thread for cat08)

This is the thread only for QQAd problems

srikar2097

hello mega, this is not the correct thread to post this Q. Use this. (official quant thread for cat08)

To answer your Q -
___10's___20's___100's___total
___29_____0_____0_____290
___27_____1_____0_____290
…15 sol. here
___1______14_____0____290
___3______13_____0____290
…
14 sols. here
___19______0_____1____290
___9_______0_____2____290
2 sol. here
___1_______9_____1____290
___3_______8_____1____290
___5_______7_____1____290
___7_______6_____1____290
___9_______5_____1____290
___11______4_____1____290
___13______3_____1____290
___15______2_____1____290
___17______1_____1____290
9 sols. here
___1_______4_____2____290
___3_______3_____2____290
___5_______2_____2____290
___7_______1_____2____290
4 sols. here

Total = 15 + 14 + 2 + 9 + 4 = 44 solutions.