You need to arrange three 7 and mathematical symbols to form number 1?

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?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

How can you leave a room with two legs and return with six legs?

Which flower has two lips?

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

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

Which is the smallest number that you can write using all the vowels exactly once?

Why Aeroplane windows are round?

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?