B) -9/10
ONLY one value must have the negative sign, otherwise it will be a positive value
The numerator (top number of the fraction) is adding up by odd numbers in order.
From 1/40 to 4/40 you add 3, from 4/40 to 9/40 you add 5, from 9/40 to 16/40 you add 7, and from 16/40 to 25/40 you add 9.
The next number to add would logically be 11. So from 25/40 you would go to 36/40.
36/40 is your next fraction.
No, its extra information
15, first, you divide 6 by 4 and that will give you how many words Ravi can type per second, then multiply by 10.
Ans: C
To deduce this, plug in each of the vertices points into f(x,y) and see which one spits out the greatest number. It happens that f(4,6)=14 > f(3,1) > f(2,-2) > f(-2,3)
