Find the next number in the series below

21 32 54 87 131 ?

81 x 9 = 801. What must you do to make the this equation true?

A spy was in Canada trying to steal insider information on how to set up new Maple Syrup factories in their country. He was introduced to the operations manager of the biggest factory in Canada. However, the manager was suspicious and decided to test him with a question before he trusted him. So he asked, “What would you be sure to find in the middle of Toronto?” The spy thought fast and came up with an answer for the manager. What was his answer?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

When it is alive we sing, when it is dead we clap our hands. What is it?

What brings you down but never up?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

What happened when the wheel was invented?

What is full of holes but still holds water?

Solve this tricky question. You are trapped in a forest. With you, you have a gun preloaded with two bullets in it. In front of you, there is a tiger, a leopard and a jaguar.

How do you survive?