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

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

I can write cow in 13 letters.

Can You?

Can you find the company name in the pictogram below?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

Buy me, smell me or deliver me, I do not change.

Who am I?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?