Find the missing number in the sequence below:

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?

You need to arrange three 7 and mathematical symbols to form number 1?

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

No matter how little or how much you use me, you change me every month. What am I?

Can you divide the below-given shape into four equal and identical pieces?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

While house hunting in London, I came across a very good leasehold property Discussing the lease the landlady told me:

'The property was originally on a 99 years lease and two-thirds of the time passed is equal to four-fifths of the time to come. Now work it out for yourself and see how many years are to go!

There was a strange boy who was born before his father. How can this be possible?

There is a certain crime, that if it is attempted, is punishable, but if it is committed, is not punishable. What is the crime?