Raunak Rander

CAT Preparation Community 2y ago

XAT MOCK 3 Question 75 Data suffiency If we take the three numbers to be a,ar&ar^2=27 ar=3 then using the second statement ar^3+ar^4=36 3r+3r^2=36 r=3 or -4 if r was negative, 27 would be negative. Then we can conclusively say that r is not negative as we have taken the other 3 numbers.