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Abhishek Dutta @ABhishek009

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Cracking Nishit Sinha Problems on Quant LA and DI , A step more to bell the Cat.

*This is a thread dedicated entirely to the problems faced by CAT Aspirants solving Nishit Sinha's Quant and LA/DI Book.* This thread will help CAt aspirants to understand the Basic concepts thoroughly for those who are using the book and wil...
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notation : a2 => a raised to power 2.


a2=by+cz ; b2=cz+ax ; c2 = ax+by;

then [x/(a+x)] + [y/(b+y)] + [z/(c+z)] = ?

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If 29 goats graze a land in 7 days or 25 goats graze the same land in 9 days. How many goats will graze the same goat in 6 days. Please me know the solution.

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how many three digit natural numbers are there which when divided by 6 gives remainder 2 but when divided by 7 gives remainder 1 ??


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  • 21. 04 May '13.
  • 21. 04 May '13.
Bleed Before War !

in a scalene triangle sum of all sides can be at most 13 units. haw many triangles are possible?please share u r approach


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Its "Do or Die" this time...
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In a recently concluded CBSE board exam,total of 6 lakh candidates appeared,40% of them are females and rest are males.Pass % of males is 75% and overall pass % is 70%.What is pass % of females?

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@incognito7 /from what i understand for vijays speed to be 0 it has to reduce 19 times .that is they gav to meet 19 times.
Two motorcyclists, Ajay and Vijay, start simultaneously from a point S on an oval track and drive around the track in the same direction, with speeds of 29 km/hr and 19 km/hr resp. Every time Ajay overtakes Vijay (anywhere on the track), both of them decrease their respective speeds by 1 km/hr. If the length of the track is 1 km, how many times do they meet at the starting point before Vijay comes to rest?
a) 2 b) 3 c) 5 d) 6
  • 2. 23 Sep '13.
972282 Says
what is unitary method ???:nono:


unitary method is nothing but the method of carrying out a calculation to find the value of one unit to find the other one.


you can solve the above question by this method too:

formula:: {error/(true value - error value)} * 100

putting this in qs
50/(1000-50)*100 = required answer:)
You need not to run fast for catching a train,but you need to be on TIME.
See,
CP is for 1000 gms , so Sp also we have to calculate for 1000 gms
We know, SP of 950gms =x
therefore, unitary method, SP of 1000 gms = x*1000/950...
Now you can calculate the profit and tereby the profit%:)...
Is the answer correct?
Any problem, get back to me! :)


what is unitary method ???:nono:
hey regarding problem 31. I am not very sure. Just let me know if my ans is correct or not. This is the approach which I followed.

Profit of A first time = Rs. 1500.
SP of A =11500
B sells at 15% loss. CP of B=11500
SP of B = 11500 * .85 = 9775.
CP of A =9775.
Therefore profit made by A in the second transaction = (10000 -9775) = 225
Total profit = 1500+225 =1725
profit % = (1725/10000)*100 =17.25%


correct, thanks
See,
CP is for 1000 gms , so Sp also we have to calculate for 1000 gms
We know, SP of 950gms =x
therefore, unitary method, SP of 1000 gms = x*1000/950...
Now you can calculate the profit and tereby the profit%:)...
Is the answer correct?
Any problem, get back to me! :)


hey regarding problem 31. I am not very sure. Just let me know if my ans is correct or not. This is the approach which I followed.

Profit of A first time = Rs. 1500.
SP of A =11500
B sells at 15% loss. CP of B=11500
SP of B = 11500 * .85 = 9775.
CP of A =9775.
Therefore profit made by A in the second transaction = (10000 -9775) = 225
Total profit = 1500+225 =1725
profit % = (1725/10000)*100 =17.25%

for QS 24:

ANSHER SHOULD BE 18.75%

sol;
let the list price be x.
so the retailer's cost price is 0.8x
and he sold at 0.95x

so % profit = {0.15x/0.80x}*100
=18.75%

You need not to run fast for catching a train,but you need to be on TIME.
could you plz help me with this ???
"
SP 0f 1000 gms = x * 1000/950
profit = 50 *x /950
% profit = 5 5/19% :grin:
"



See,
CP is for 1000 gms , so Sp also we have to calculate for 1000 gms
We know, SP of 950gms =x
therefore, unitary method, SP of 1000 gms = x*1000/950...
Now you can calculate the profit and tereby the profit%:)...
Is the answer correct?
Any problem, get back to me!
972282 Says
No answer is 'C'...



Let the list price be 'a'

CP(retailer) = SP (wholeseller) = a x 0.8

SP(retailer) = a x 0.95 = 38

therefore, a = 40

SP (retailer) = 38 and CP (retailer) = 40 x 0.8 =32

Profit for retailer = 38 - 32 = 6

so option C) is the answer

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