In the image below, can you find the value of an angle(y)

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

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

John decided to give his bike 3 coats of paint. Which coat would go on the first?

What is Luis Suarez's (Soccer Player) favorite tea?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

Can you count the number of quadrilaterals in the picture below?