What question can you never answer yes to?

Prove that twice of ten is the same as twice of eleven.

What Time Should the last watch show in the below figure?

The centre of the third figure is empty. What digit should fit inside?

Count the number of triangles in the given picture.

Which flower has two lips?

Can you decipher the below rebus?

PBLUESAISNUERSES

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?