Think of a number between 1-9, multiply it by 9, then add the number you want, and finally add the number you want to the number in your mind.

Because no matter any number in 1-9 is multiplied by 9, the sum of several numbers and ten numbers is 9, and the ten numbers obtained by adding any number to 9 are 1, which is smaller than the number you want 1. The last two digits are of course the numbers you want.