How many three digit numbers have the property that the sum of that number?

How many three digit numbers have the property that the sum of that number?

We have 307, 317, 327, … , 397. We have 906, 916, 926, … , 996. A total of 180 three digit numbers. [Note: Even though many, for example 104 + 401 and 401 + 104, have the same required sum they will not be considered duplicates.]

How many three digit multiples of have the sum of the digits also equal?

25 three-digit multiples of 18 have the sum of the digits which also equal 18.

How many three digit numbers are there such that the sum of the digits in each number is 10?

Originally Answered: How many 3-digit numbers are there such that the sum of their digits is equal to 10? There are 54 numbers.

How many 3-digit numbers are multiples of 18 have the sum of the digits also equal to 18?

Here are some 3-digit multiples of 18 having the sum of digits also equal to 18: 198, 288, 378, 396, 468, 486, 558, 576, 594, 648, 666, 684, 738, 756, 774, 792, 828, 846, 864, 918, 936, 954, 972, 990.

What is the largest 3-digit number that is a multiple of 18?

How about the largest? Well the answer to those questions is 6 and 55, respectively. Hence, there are 50 3-digit numbers that are multiples of 18. The biggest three digit number is 999 and smallest is 100.

What are 3 numbers that add up to 10?

Answer: 1, 9, and 10 are the three numbers. , Just interested in math is all. Kinda a hobby.

How many 4-digit numbers have their sum equal to 7?

There exist 84 possible 4 digits that has its digit sum equaling to 7. Also there exist 210 possible 4 digits that sum up to 7. I will discuss how to logically approach the calculation of 4 digits giving sum equal to 7 here since sum up to 7 is just a special case which is discussed in the mathematical approach.

How many three-digit numbers that satisfy the middle digit property?

If the middle digit is , the only possible number is . So there is number in this case. So the total number of three-digit numbers that satisfy the property is Alternatively, we could note that the middle digit is uniquely defined by the first and third digits since it is half of their sum.

How many three-digit numbers add to 9?

It shows there are 45 three-digit numbers whose digits add to 9. You can try other sums and numbers of digits too. UPDATE: Using the above tool to generalize to different numbers of digits: It shows there are 45 three-digit numbers whose digits add to 9.

What is the sum of all 3 digit numbers greater than 900?

Numbers that are divisible by 9 all meet your criteria that the sum of their digits equals 9 when done to the second order. If the sum of the digits of a number is divisible by 9 the number is also divisible by 9. The sum of the digits of all 3-digit numbers greater than 900 divisible by 9 will be either 18 or 27.