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

Can you identify the Oscar-winning movie from the rebus below?

Find out the number of circles in the given picture having Illusion

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

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

What am I?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

When it's bad luck to meet a black cat?

Mr. Buttons was all set to go to the village of Buttonland to meet his friend. So, he packed his bags and left for the village at 5 in the morning. Upon travelling on a road for miles, he came across a point where the road diverged into two. He was confused on which road to take. He gazed around and he saw two owls sitting on a branch. He thought he could ask for directions for the village from the two owls. So he went to the tree. There he saw a sign which read, "One owl always lies, and one is always truthful. They both fly away if you ask them more than 1 question."
Mr. Buttons was caught in the dilemma of what to ask? And from which owl to ask, since he only had one question. What should Mr. Buttons ask?