Which of the following is divisible by 15?
74355
74355 is correct.
A number is divisible by 15 when it is divisible by both 3 and 5.
All four numbers end in 5, so each is divisible by 5. Digit sums: 74255 → 23, 74345 → 23, 74365 → 25, 74355 → 24.
Only 24 is a multiple of 3, so 74355 is divisible by 15 (\(74355=15\times 4957\)).
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Consider all 3-digit numbers (without repetition of digits) obtained using three non-zero digits which are multiples of 3. Let S be their sum.
Which of the following is/are correct?
1. S is always divisible by 74.
2. S is always divisible by 9.
select the correct answer using the code given below:
How many 3-digit natural numbers (without repetition of digits) are there such that each digit is odd and the number is divisible by 5?
