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

Find
6 * 5 * 4 = ?

What has many keys but can’t open a single lock?

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?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

We can be boring,Or interesting.
We can be long,Or short.
We can have pictures,Or just words.
Many love us,But many also hate us.
What are we?