Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

An ant is travelling on a 1-meter-long rope at 1 cm/second but also the entire rope is being stretched by an extra 1 meter/second. Is it possible for the ant to reach at the end of the rope?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

Sachin bought a car with a strange 5 digit numbered plate.The water image of the number is 78633 more than my car number. All the digits of car number are distinct.

What is the original number on number plate?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

When is the top of a mountain similar to a savings account?

Solve the following series:
AZ, GT, MN, __, YB