20 POINTS! please help this is due soon and I really don't get these

Step-by-step explanation:

Riddle #3

1000's digit is 7 as it is the only prime number over 6

One's digit is 2 as it is the only even prime number.

Ten's digit is half of 100's and the number is divisible by 4

Therefore it should be either 8 & 4 or 6 & 3 or 4 & 2 or 2 & 1

In the case of 8 & 4 and 4 & 2 the number is not divisible by 4

It can't be 1 & 2 as all the digits are different.

So the number is 7632

Riddle #4

Since the number is divisible by 5, One's number should be either 5 or 0

Therefore tens digit should be 8 or 3 as it is 3 more than the one's digit

The number should be 485 as the sum is 17.

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125 yards

step-by-step explanation:

i take 75 plus 50.