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Question

The number 56890065 is completely divisible by only:

The correct answer is

3

The problem requires determining which number completely divides 56890065 from the given options. To solve this, we need to apply divisibility rules.

Divisibility by 9: A number is divisible by 9 if the sum of its digits is divisible by 9. For 56890065, the sum of digits is 5+6+8+9+0+0+6+5 = 39. Since 39 is not divisible by 9, 56890065 is not divisible by 9.

Divisibility by 3: A number is divisible by 3 if the sum of its digits is divisible by 3. The sum of the digits, 39, is divisible by 3 (39 ÷ 3 = 13). Therefore, 56890065 is divisible by 3.

Divisibility by 11 and 4: For 11, the rule is alternating sum of digits should be divisible by 11. Alternating sum: (5-6+8-9+0-0+6-5) = -1, which is not divisible by 11. For 4, the last two digits, 65, are not divisible by 4. Therefore, 56890065 is not divisible by both 11 and 4.

Divisibility by 6 and 7: A number is divisible by 6 if divisible by both 2 and 3. 56890065 is not divisible by 2 (it's odd). Also, no individual test needed for 7 as 56890065 is not divisible by 6. Combined divisible by 6 and 7 is not possible here.

Thus, 56890065 is completely divisible by 3.

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Important Questions from Divisibility and Remainder

  1. If all positive divisors of 132 are arranged in descending order, then what digit will be at unit place of first divisor ?

  2. If 3 2019 is divided by 10, then what is the remainder?

  3. The number 3798125P369 is divisible by 7. What is the value of the digit P?

  4. 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:

  5. 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?

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