In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

What is next number in the pattern below:

131 517 192 123 ?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

A sundial has the fewest moving parts of any timepiece. Which has the most?

Name a key which is hardest to turn.

John speaks the truth only once a day in a week. Below are a few hints for you:

First: Days are Sunday, Monday and so on.
Second: One day he says, "I lie on Monday and Tuesday".
Third: On the next day, he says, "Today is either Thursday, Saturday or Sunday".
Fourth: On the next day, he says, "I lie on Wednesday and Friday".

Can you identify the day on which he speaks the truth?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

Can you solve this tricky maths equation problem by replacing it? mark with the correct symbol?

19834 -----: 187
15921 -----: 153
17561 -----: 139
13734 -----: ???