Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

How many triangles are there in the picture below?

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

Can you tell me how many number of 20-paisa and 25-paisa he got?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

Our product and our sum always give the same answer. Who are we?

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

There is a number which when you multiply by 3 and subtract 2 from the result, then the resulting number is the reverse of the actual number.

What is the smallest number that stands true on the statement?