What begins with T, ends with T, and has T in it?

Why do you find that most of the buildings are deprived of the 13th floor?

Which five letter word can be added at the end of below word to form a
valid word?

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What does this rebus means ?

PROG WORKRESS

What number should come in place of the question mark below?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

John gave half of the apples he had plus one more to Jacob. He gave half of the remaining ones plus one more to James. Now, John was left with just one apple.

Can you find out how many did he have in the beginning?

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

How can you leave a room with two legs and return with six legs?