Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

Can you find out the remainder when 3^300 is divided by 5?

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

What is the Surname of Barbie Doll?

In a classic wine shop, the list of three most popular wines are:
- The cost of 1 French wine bottle: 500$
- The cost of 1 German wine bottle: 100$
- The cost of 20 Dutch wine bottles: 100$

John entered the wine shop and he needs to buy
- All three types of wine bottles.
- Needs to buy Dutch wine bottles in multiples of 20.
- Need to buy 100 wine bottles in total.

John has only 10000$. How many wine bottles of each type, John must buy?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

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

John was gifted a new Hayabusa. He drove x miles at 55mph. Then he drove x+20 miles at 40mps. He drove his bike for 100 minutes. How much distance did he travel?

What is the riddle which can be asked all day with a different correct answer each time.