Find the value of "?" in the ball picture Riddle below:

What has one eye, but can’t see?

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

Doctor Alex and a bus driver John are both in love with the same woman named Olivia. The bus driver need to go for a long trip of 10 days, Before he left he gave Olivia 10 apples.

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

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?

What begins with T, ends with T, and has T in it?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?