What is the difference between a jeweller and a jailer?

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Like you see, some letters have gone missing from these words that contain the IE pair at some or the other place. The letters that will be used to fill the blanks are given below. Use them and form meaningful words. Can you do that?

A, C, D, F, H, K, L, M, N, N, O, R, R, S, S, S, T, T, Y and Y.

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

It is always ahead of me yet I can never see it. What is it?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

What do you answer even though it never asks you questions?

What can you catch but never throw?

I look at you, you look at me, I raise my right, you raise your left. What am I?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?