You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

If eleven plus two equals one, what does nine plus five equal?

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

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

Which alphabet is a part of our body?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

O_er_t_o_

Complete the missing letters of the given word.

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?