Complete the series: B, D, F, H, ?

A. J
Posted in:  Alphabet Series -  Series Completion -  Verbal Reasoning

If the roots of the quadratic equation ax^2 + bx + c = 0 are 3 and 4, what is the value of a if b = -7 and c = 12?

A. 1
Posted in:  Basic Operations & Factorization -  Algebra -  Mathematics

Find the odd one out in the series: A, D, G, J, M, P, S

A. D
Posted in:  Alphabet Series -  Series Completion -  Verbal Reasoning

Find the missing number in the series: 5, 10, 20, 40, ?

C. 80
Posted in:  Number Series -  Series Completion -  Verbal Reasoning

If 12 : 144 :: 10 : ?

A. 100
Posted in:  Number Analogy -  Analogy -  Verbal Reasoning