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

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

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?

I have eight fingers and two thumbs but I do not live. What Am I?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

What makes this number unique: 8,549,176,320?

Can you spot the man between the coffee bean in the picture below ?

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

What breaks yet never falls, and what falls yet never breaks?

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?