You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

Which letter of the alphabet has the most water?

Find out the missing number in the picture attached:

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?

What do you see in the image below

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

Can you count the number of quadrilaterals in the picture below?

What work can one never finish?