What is the sum of all three-digit numbers that is divisible by 15?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 32850.
The first three-digit number divisible by 15 = 105
The last three-digit number divisible by 15 = 990
Number of terms = [(990 - 105)/15] + 1 = (885/15) + 1 = 59 + 1 = 60
Sum = (60/2) × (105 + 990) = 30 × 1095 = 32850
Therefore, the sum of all three-digit numbers divisible by 15 is 32850.