Can anyone tell me a word in the English dictionary which has a silent 'z'?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

What goes through cities and fields, but never moves?

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?

Why do people go to bed?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

There are two dice with empty faces in front of you and a marker. You can mark any number on each of the faces of the two dice, but you have to display all 31 days of the month using the two of them.

Which numbers will you mark on which dice so that you can easily depict all the dates of the month?

What month of the year has 28 days?

Solve this riddle by finding the odd one out from the rest.

You need to remove two matchsticks to make the below equation true. Can you do it ?