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

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

The dirtier I get, the whiter I look. Who am I?

Suppose you are sitting in an interview and the interviewee asks you an aptitude question.

You have three buckets with a capacity of 4 litres, 8 litres and 10 litres and you have a large tank of water. Now you have to measure 3 litres of water precisely using those buckets. How will you do it?

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

You see me once in June, twice in November, and not at all in May. What am I?

Sally lives in a place where six months of the year is mild summer and the temperature drops significantly the other six months. She owns a lake where there is a small island. She wants to build a house on the island and needs to get materials there. She doesn’t have a boat, plane, or anything to transport them to the island. How does Sally solve this problem?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?