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If the digit '1' occupies the hundreds place then the other two digits total 8.
108, 117, 126, 135, 144, 153, 162, 171, 180 (9 three digit numbers)
Similarly with '2 in the hundreds position the the remaining digits total 7.
207, 216, 225, 234, 243, 252, 261, 270 (8 three digit numbers)
When the remaining numbers 3 to 9 are set as the lead digit then the number of three digit numbers formed decreases by one each time.
The final total of such numbers is, 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 45.
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Related Questions
What is the sum of one digit numbers?
45 i think so...
How many three digit numbers are there that has the first digit is bigger than the last?
45
What three consecutive odd numbers have a sum of 45?
5*9= 45
What three consectutive numbers have a sum of 45?
14 + 15 + 16 = 45
The sum of three consecutive odd numbers is 45 What are the smallest of these numbers?
The smallest of the three is 13.
The gcf of three numbers is 9 the sum of the numbers is 90 find the three numbers?
18, 27, 45
What are three consecutive odd numbers that have a sum of 45?
13+15+17=45
What three consecvtive odd numbers have the the sum of 45?
They are: 13+15+17 = 45
Three consecutive numbers have the sum of 135 what are the numbers?
44 + 45 + 46 = 135
Three consecutive numbers have a sum of 135 what are the numbers?
44 + 45 + 46 = 135
What are three consecutive numbers whose sum is 132?
The numbers are 43, 44 and 45.
What three prime numbers equal 45?
Sum of 3, 19 & 23 is equal to 45.
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