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2^90/91 remainder?

Increase in denominator,decreases the fraction value by how much percent?

There are 4 qualifying examinations to enter into Oxford University: RAT, BAT, SAT, and PAT. An Engineer cannot go to Oxford University through BAT or SAT, A CA on the other hand can go to the Oxford University through the RAT, BAT & PAT but not through SAT. Further there are 3 ways to become a CA (viz, Foundation, Inter & Final). Find the ratio of number of ways in which an Engineer can make it Oxford University to the number of ways a CA can make it to Oxford University.

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?