A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

A man is found dead in his bathroom naked with blood scattered all around him. The bathroom was locked from the inside and there is no trace of any struggle. There is nothing in the bathroom except his pant with the belt still around and his shirt. Also, the medic team can't find any incision in his body that may have been the reason behind so much blood loss.

The Police department is clueless regarding this murder mystery.
Can you?

What do you see in the given picture?

Can you find the six hidden animals in the picture below?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?