Question

consider a two digit number "ab". square the number and divide the resultant by half of the numer. then add 18 in the resultant. and then divide by 2 the resultant. How many numbers are possible that it reversing the digit ex. "ba".

option:
A. 7
B. 8
C. 9
D. one more option I don't remember

Answer 1

D because I dont remember.