Quantitative Aptitude - Arithmetic Ability Questions

A triangular prism has 9 edges. How many vertices does it have?

What is the value of the expression a3 - 5 + 2816a, when a = 2?

The sum of a fraction and 4 times its reciprocal is 13/3. What is the fraction?

If x3 – 4x2 + 19 = 6(x – 1), then what is the value of [x2 + (1/x – 4)]?

If x – 3 + [1/(x – 3)] = 4, what is the value of [(x – 3)3+ [1/(x – 3)3]?

Two pipes X and Y can fill an empty tank in 16 hours and 20 hours respectively. Pipe Z alone can empty the completely filled tank in 25 hours. Firstly both pipes X and Y are opened and after 6 hours pipe Z is also opened. What will be the total time (in hours) taken to completely fill the tank?

The sum of a non-zero number and ten times its reciprocal is 7. Find the number.

In the following question, four number pairs are given. The number on left side of (–) is related to the number of the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.