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Please explain.... How 15 days????

In today's CAT quotient on Quadratic Equations Test 3 Question 2, the co-efficient of x in the question is a(a-2) while it is solved as (a-2) leading to a wrong answer and deduction of marks. Please verify your questions and answers before we take the test.

if x,y,x are in GP and a^x,b^y,c^z are equal then a,c,b are in i)AP ii)GP iii)HP

A, B and C can do a piece of work in 20 days, 30 days and 60 days. If A works continuously and on every third day B and C also work with A, then in how many days the work will be completed???

How to solve cryptarithmetic questions ?

And is a three digit number in which A>0.Yhe value of ABC is equal to sum of factorial of its three digits. What is value of B

penny meaning in hindi?

A CAN COMPLETE A PIECE OF WORK IN 10 DAYS, B IN 15 DAYS AND C IN 20 DAYS. A AND C WORKED TOGETHER FOR 2 DAYS AND THEN A WAS REPLACED BY B. IN HOW MANY DAYS, ALTOGETHER WAS THE WORK COMPLETED??

1/a+1/b+1/c=3/4. If a,b and c are natural numbers, how many such triplets (a,b,c) exist?

#Preposition

This will bring you ______ Jahangir Street , and you'll find the library ______ your left .