Find the next number in the series below

21 32 54 87 131 ?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

I am the fastest animal but cannot climb the tree. What am I?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

What happened when the wheel was invented?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

Can you write down eight eights so that they add up to one thousand?

What has many teeth, but cannot bite?