You along with your friend are standing in front of two houses. Each of those houses inhabits a family with two children.

Your friend tells you the below two facts:
1) On your left is a family that has a boy who likes accounts but the other child loves science.
2) On the right is a family with a seven-year-old boy and a newborn baby.

You ask him, "Does either of the family have a girl?"

To this, he replies, "I am not quite sure. But can you guess that? If you are right, I will give you $500."

Which family do you think is likely to have a girl?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

What does this mean?

CCCCCCC

I left my campsite and hiked south for 3 miles. Then I turned east and hiked for 3 miles. I then turned north and hiked for 3 miles, at which time I came upon a bear inside my tent eating my food! What colour was the bear?

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?

Spot 5 differences in two Christmas tree below: