what does the below math rebus puzzle mean?

Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

O_er_t_o_

Complete the missing letters of the given word.

What's the only room from which no one can enter or leave

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

What kind of band never plays music?