числа

I don't always clear numbers in the calculator, but when I do I hit both the "c" and "se" delete icons because I don't know for sure what they do

can you solve this? Fill in the blanks using the given numbers: (1,3,5,7,9,11,13,15) The same number can be used more than once.

The most wonderful number is 73! 73 is the 21st prime number, its mirror image 37 is the 12th... whose reflection 21 is the result of multiplication... don't fall... 7 and 3!