1. A number has three digits and is equal to 12 times the sum of its digits what the number is? Solution: Assume three digit number = xyz, then 100x + 10y + z = 12(x + y + Z) 100x + 10y + z = 12x + 12y + 12Z Solve to get 88x = 2y + 11z Take x=1, then y=0 and z= 8 in order to satisfy the equation. Th...