What is common among 11, 69, and 88?

How can you take 2 from 5 and leave 4?

Can you find the hidden animal in the picture below?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

Can you decipher the below rebus?

PBLUESAISNUERSES

Take away the whole and some still remain. What is it?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

A mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?

You can hear me, but you can't touch or see me.

What am I?

The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total.

How much time will he take to have all the five tablets?