Arithmetic for CAT 2013

Will post only Arithmetic Questions in this thread…Here is the 1st one A and B have,between them,Rs 1200. A spends 12% of his money B spends 20% of his money. They are left with a sum which constitutes 85% of the whole sum. Find out what am…

Will post only Arithmetic Questions in this thread..Here is the 1st one


A and B have,between them,Rs 1200. A spends 12% of his money B spends 20% of his money. They are left with a sum which constitutes 85% of the whole sum. Find out what amount is left with A
(a) Rs 750
(b)Rs 800
(c)Rs 700
(d)Rs 660

Simple Alligation and Mixture question. Amount with A is Rs.750.

Q) If the sum of first n terms of A.P is P*n+Q*n^2 , where P and Q are constants, then common difference of A.P will Be..
Ans> 2Q (How?)

the cost of production of a 50 kg bag of cement is rs. 90 and it sold of rs 120. the govt. imposes a tax of 10% on the cost of production. if the govt. changes its policy and levises the 10% tax on the selling price instead of cost price , by what percent does the profit decrease?( assume selling price is unchanged)


Kindly come up with approch..lookroundlookround

please slove this .