A and B can complete a work in 20 days and 30 days respectively. If they work together for 10 days, how much of the work is left?

A. 1/3
Posted in:  Time & Work -  Aptitude -  Mathematics

In a set of five colors: Red, Blue, Green, Yellow, and Orange, Red is brighter than Blue but darker than Green. Yellow is brighter than Orange but darker than Blue. Which color is the darkest?

D. ORANGE

What number should replace the question mark in the series: 2, 4, 8, 16, ?

B. 32

A, B, C, D, and E are five books arranged on a shelf. The conditions are: A is to the left of B but to the right of C. D is to the right of E but to the left of A. Which book is in the middle position?

D. D

A can complete a work in 12 days, while B can complete the same work in 18 days. How many days will they take to complete the work together?

B. 8 DAYS
Posted in:  Time & Work -  Aptitude -  Mathematics