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View Full Version : **power Prep Ques--urgent**



r2kins
09-25-2004, 07:38 PM
Q1: r = s^3#6 ( i.e--- s raised to the power 3#6)

and s^# = 10 ( i.e---- s raised to the power # )

COLUMN A: #^3

COLUMN B: r/1000


The ans is C ( both are equal) plz EXPLAIN how????

By the way...no other information about " # " is given.!!!


Q 2 :
72.4=k(24+n/100)

n < 100

k+ n=?


the ans is 17....i did it after some long and tedious calculations
can somebody suggest a shorter method???


Q3: If one number is chosen at random from the first 1000 positive integers
,then what is the probability that the number is a multiple of 2 and 8?

I did this the simple way...a multiple of 8 would invariably be a multiple
of 2 also....so the ques would be to find multiples of 8...since every
8'th number will be a multiple of 8 ...so the ans is 1/8

but this approach may not be instrumental in solving some other ques.
SO, PLEASE SUGGEST SOME DIFFERENT APPROACHES TO THIS QUESTION.

Azzkikr6969
09-25-2004, 08:44 PM
I can do #2 for you

Q 2 : (I believe it was 72.42)
72.4=k(24+n/100)

n < 100

k+ n=?

72.42 = 24k +kn/100 = 72.42 = (2400k +kn)/100
7242 = k(2400+n) you know that k must be 3 or else it can't be a good division. Now plug in n to see when you get 42 when multiplied by 3. and that is 14
k+n = 14+3 = 17 (this took me 1 minute)

rashmi
09-25-2004, 09:53 PM
2) 72.42 = 72 + .42
= 72 + 42/100
= 24*3 + 14*3/100
= 3(24 + 14/100)
Compare this with k(24+n/100)
thus k=3, n=14 ,k+n=17.

rashmi
09-25-2004, 10:51 PM
THE FIRST SEEMS FUNNY ,BUT MAY BE THE ANSWER IS b.

r2kins
09-25-2004, 11:03 PM
thanks for answering the 2'nd one.....

hi rashmi

THE ANS TO THE FIRST ONE IS NOT b BUT c...ITS IN PP TEST NO:2....ANYWAYS ....IF U GET ANY IDEA ABOUT IT DO POST!!

tans
09-26-2004, 02:09 PM
heyyyy kinshukfor the first prob can u plzz give the exact powerprep page what was there? may be the jpg image if possible?:hmm:

tans
09-28-2004, 02:40 PM
heyy any one
i m not getting the answer of the first prob. has anyone solved it? then plzz post the ans and expplanation

tans
09-28-2004, 04:58 PM
hey, i think there is typo in the first one, i gotthe prob in pp2 today

cskumar
10-04-2004, 09:58 AM
Are k and n integers?
Take n=50 ie < 100; you'll get sthg else for k and so k+n.