I am a word that begins with the letter “i.” If you add the letter “a” to me, I become a new word with a different meaning, but that sounds exactly the same. What word am I?

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

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

Our product and our sum always give the same answer. Who are we?

What does this say?

XLR8

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

Can you make four (4) nines (9) equal 100?

A father's child, a mother's child, yet no one's son.

Who am I?

What makes this number unique: 8,549,176,320?

Through your logical capabilities, can you make 7 an even?