Finding the odd one out

Maths

From the following numbers, select the odd one out  because it has less than 4 hundreds...

From the following numbers, select the odd one out  because it rounds down to a lower multiple of 100...

From the following numbers, select the odd one out because it rounds to a three digit number...

From the following numbers, select the odd one out  because it has less than 5 thousands.

From the following numbers, select the odd one out  because when it's rounded to the nearest 1000, it rounds to 4000.

My number is 3740. Which of the following are the nearest two multiples of 1000?

My number is 8500. Which of the following are the nearest two multiples of 1000?

My answer is 1000, my number has been rounded to the nearest 1000. Which of the following numbers could my number have been?