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how should i start my po preperation i have 18 months left 

sir! please explain simplifications with easy methods

a contractor undertook to do a certain work in 75 days and employed 48 men to do it.after 55 days he found that only 2/3 of the work was done .how many more men must be employed so that the work may finished in time?

Circle C1 has a radius of 3 units. The line segment
PQ is the only diameter of the circle which is
parallel to the X axis. P and Q are points on curves
given by the equations y + ax and y = 2ax
respectively, where a < 1. The value of a is:

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P is six times as large as q. The percent that q is less than p, is

i want to purchase sectional tests only

how to solve calender problems easily

Ashok can complete a work in 10 days if he works for 4 hours everyday. Bharath can complete the same work in 4 days and Charan in 8 days but have to work 8 hours and 7 hours a day respectively. If Bharath and Charan can complete another work in 7 days working for 4 hours a day, then how many days would Ashok take to complete the work if he works for 5 hours a day?

A, B and C are 3 varieties of beer which contains starch, hops and water in varying proportions. A contains x% starch and y% hops. B contains y% starch and y% water. C contains x% hops and y% water. When A, B and C are mixed in the ratio 2:3:5, then the final mixture has 38% starch and 28% hops. Find the sum of x and y?