Find next: 5, 10, 20, 40, ?

Find the next term: 1, 4, 13, 40, 121, ?

Statements: All flowers are plants. Some plants are trees. Some trees are fruits. All fruits are vegetables. Which conclusion(s) follow? (I) Some flowers are trees. (II) Some plants are vegetables. (III) Some trees are vegetables.

Statements: Some politicians are actors. Some actors are directors. No director is a writer. Some writers are singers. Conclusion I: Some politicians are writers. Conclusion II: Some actors are singers. Which is valid?

Which number replaces the question mark: 2, 5, 11, 23, 47, ?

Five people A, B, C, D, E sit in a row facing north. A sits at one end. B sits next to A. C does not sit next to B. D sits between C and E. Who sits at the other end?