If all the digits in each of the numbers are arranged in descending order within the number, which of the following will form the lowest in the new arrangement of numbers?

If all the numbers are arranged in ascending order from left to right, which of the following will be the sum of all the three digits of the number which is exactly in the middle of the new arrangement?

What will be the resultant of third digit of the lowest number is multiplied with the second digit of the highest number?

If one is added to the first digit of each of the numbers, how many numbers thus formed will be divisible by three?