Yes, it is. 1 + 7 + 5 + 2 is 15. Let me give you something easy to remember that.
A number is divisible by three if the sum of the digits is divisible by 3.
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Yes.
876, 1752, 2628, 3504, 7008, 767376, and all other multiples of 876 are divisible by 876.
Yes, it is obviously divisible by 10 so therefore also 5.Yes and it is 1752
Yes, if x is an integer divisible by 3, then x^2 is also divisible by 3. This is because for any integer x, x^2 will also be divisible by 3 if x is divisible by 3. This can be proven using the property that the square of any integer divisible by 3 will also be divisible by 3.
All numbers divisible by 3 are NOT divisible by 9. As an example, 6, which is divisible by 3, is not divisible by 9. However, all numbers divisible by 9 are also divisible by 3 because 9 is divisible by 3.