Using Only Five 5's and any mathematical operator make sum as 37

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

Find the value of "?" in the ball picture Riddle below:

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

What number divided by 4 is the same as that number minus 4?

How do you go from 98 to 720 using just one letter?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?