During which month do people sleep the least?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

A Shopkeeper sold a few chickens to four different customers on a particular day. It was such that each customer purchased half of the remaining chickens and half the chicken more.

Can you find out how many chicken were sold by the shopkeeper on that day if we tell you that the fourth customer bought a single chicken ?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

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.

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

Out of four images which one is the odd one out?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

If eleven plus two equals one, what does nine plus five equal?

Chef Andrea has to light the kitchen stoves to open her restaurant for the day. There are three stoves in the kitchen: A glass stove, a brick stove, and a wood stove. She only has one match. Which does she light up first?