Which database model is based on the mathematical set

What will be the resultant if the first digit of the lowest number is multiplied by the third digit of the highest number?

Select the option in which the numbers are related in the same way as the numbers of the following set.

(25, 18, 225)

What should come next in the following number series?

5 6 7 5 5 6 6 7 7 5 5 5 6 6 6 7 7 7 5 5 5 5

Select the letter from among the given options that can replace the question mark (?) in the following series.

P, N, J, H, ?

If 2 is subtracted from the second digits of each of the numbers, how many numbers thus formed will be divisible by three?

Select the option that is related to the third term in the same way as the second term is related to the first term.

17 : 361 : : 21 :______