How can you make number one disappear by adding something to it?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

John was drowned by he was not wet. How?

What does this mathematical rebus means ?

What has hands, but can’t clap?

Can you find the thief by just looking at the picture below?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

Prove that the below maths equation is true.

8 + 8 = 91

What does below rebus means ?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.