A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

Name the three-letter word that can complete the below words?

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

What 5-letter word typed in all capital letters can be read the same upside down?

What does below rebus means ?

Why 1729 is a magic number? Answer Logically.

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

When is the top of a mountain similar to a savings account?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

Can you write down eight eights so that they add up to one thousand?