If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

John bought a new car. He has a habit of eating ice cream from a particular ice cream shop while returning home from office. Whenever, he eats strawberry ice cream, he faces no problem. But whenever, he eats chocolate ice cream, the car starts giving problem. At first, he thinks, it is just a co-incidence but when this awkward incident happens for 3-4 times, he reports this problem to the company.

The mechanic of the company checks but finds no problem at all. The next day, when he stops by to eat chocolate ice cream, the car again starts giving problem.

Can you find the possible reason?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

What's the only room from which no one can enter or leave

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

What came first, the chicken or the egg?

What is the centre of gravity?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?