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How can I join the cracku whatsapp group?

B=A*C and if B=1 A and C should be reciprocals but why can't they both be negative? (I think because we have logC (base A) in the question, correct?)

Five different prizes are to be distributed among 3 different students such that each student gets at least one prize.The total number of ways the prizes can be distributed.

Find the sum of the first 125 terms of the sequence 1,2,1,3,2,1,4,3,2,1,5,4,3,2... Please give me explaination as I already have solution and give the best possible solution which is quick and easy to grasp. I got the solution though but with brute force which is quite cumbersome and time consuming and certainly not feasible.

spotting error

if |r-6|=11 and |2q-12|=8, what could be the minimum possible value of q/r

How we can solve questionson time and work easily?

Which books is better for LRDI

Good book for cat

Can I get 90% plus if I start my preparation now? I mean the basics.