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Oliveboard Question of the day
If A = 200
B = A – 99
C = A + B – 98
D = A + B + C – 97 and so on upto Z.
Find the value of 2-25(Z+1)
Options:
- 50
- 51
- 26
- None of these
Solution posted below. Click on the plus sign to view the solution.
Answer and Explanation
Answer key: 2
A = 200
B = 101
C = 203
D = 407
E = 815
This way we see that for the nth English alphabet (where n>1), the value is (2n-2 x 100) + (2n-1 – 1).
So, Z = (224x100) + (225-1) So, Z + 1 = (224x100) + (225-1) + 1 = 225(50 + 1)
So, 2-25(Z+1) = 2-25 x 225(50 + 1)
= 51
