SAT Math Practice Question #27338 - SATify | SATify
#27338
digits
number theory
medium
120 sec
Let ♣(x) denote the sum of the digits of the positive integer x. For example, ♣(8)=8 and ♣(123)=1+2+3=6. For how many positive integer values of x less than 100 is ♣(♣(x))=3?