A number of three digits in base 7, when expressed in base 9, has its digitsreversed in the order. What is the sum of the digits of the number

Find the sum of all three-digit natural numbers, which are divisible by 7

How many three-digit numbers in base 10 are three-digit numbers in base 8 but not in base 7?

The sum of the digits of a two digit number is 7. If the digits are reversed,the new number decreased by 2, equals twice the original number. Findthe number.

Consider a 3-digit number of three distinct digits. The digits of the number are rearranged to form a new 3-digit number such that the position of each of the digits is changed. The sum of these two numbers is a 4-digit number whose first two digits are the same as the first digit of the original number and the last digit is 8. Also the sum of the first and last digits of the original number is 8. Find the original and the rearranged number.

How many numbers of three digits can be formed with digits 1, 3, 5, 7 and 9?*2 points9831203455430