I am reposting because no one answered the first time, but can someone please help with 12 and 13

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?

Margie is practicing for an upcoming tennis tournament. her first serve is good 20 out of 30 times on average. margie wants to know the estimated probability that her first serve will be good at least four of the next six times she serves. how could she design a simulation for this scenario?

What rule describes a dilation with a scale factor of 4 and the center of dilation at the origin?