Ah, what a happy little math problem we have here! If we take the number 15 and multiply it by itself, we get 30. Isn't that just delightful? Remember, mistakes are just happy accidents, so keep on exploring and discovering new things!
-17
25
30 is not a ratio. In a ratio, two numbers are always specified, for example, 30:1. If that's what you mean, you can simply multiply both numbers - in this case, 30 and 1 - by any real number (both by the same real number), to get an equivalent ratio.
30
30 multiplied by 15 is equal to 450. This can be calculated by multiplying the two numbers together using the standard multiplication algorithm: 30 x 15 = 450.
They are: 30*30 = 900
The two consecutive numbers which when added equal 59 are 29 and 30.
6 and -5
31
-117
-30
42
43
-17
-17
47
-958