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Question

If the eight-digit number $59044p22$ is divisible by 6, then the maximum value of p is:

The correct answer is
7

To find the maximum value of the digit 'p' in the eight-digit number $59044p22$ such that it is divisible by 6, we need to apply the divisibility rules for 6.

Understanding Divisibility by 6

A number is divisible by 6 if and only if it meets two conditions:

  • It must be divisible by 2.
  • It must be divisible by 3.

Checking Divisibility by 2

The rule for divisibility by 2 states that the last digit of the number must be an even digit (0, 2, 4, 6, or 8).

In the number $59044p22$, the last digit is 2.

Since 2 is an even digit, the number $59044p22$ is always divisible by 2, regardless of the value of 'p'.

Checking Divisibility by 3

The rule for divisibility by 3 states that the sum of the digits of the number must be divisible by 3.

Let's calculate the sum of the digits of $59044p22$:

Sum $= 5 + 9 + 0 + 4 + 4 + p + 2 + 2$

Sum $= (5 + 9 + 0 + 4 + 4 + 2 + 2) + p$

Sum $= 26 + p$

For the number to be divisible by 3, the sum ($26 + p$) must be a multiple of 3.

Finding the Maximum Value of 'p'

The variable 'p' represents a single digit, so its possible values are $0, 1, 2, 3, 4, 5, 6, 7, 8, 9$.

We need to find the largest value of 'p' from this set that makes $26 + p$ divisible by 3.

Let's test the possible values of 'p', starting from the largest (9) downwards:

  • If $p = 9$, Sum $= 26 + 9 = 35$. ($35 \div 3$ has a remainder of 2)
  • If $p = 8$, Sum $= 26 + 8 = 34$. ($34 \div 3$ has a remainder of 1)
  • If $p = 7$, Sum $= 26 + 7 = 33$. ($33 \div 3 = 11$). 33 is divisible by 3.

Since we found a value of 'p' (which is 7) that satisfies the divisibility by 3 condition, and we are looking for the maximum value, $p=7$ is the answer.

Other values like $p=4$ (Sum=30) and $p=1$ (Sum=27) also make the number divisible by 3, but 7 is the maximum among these possibilities.

Conclusion

The maximum value of the digit 'p' for the number $59044p22$ to be divisible by 6 is 7.

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Important Questions from Divisibility Rules

  1. If the number 6484a6 is divisible by 8, then find the least value of a.

  2. Which of the following numbers is divisible by 87?
  3. Which of the following numbers is divisible by 47?
  4. If the eight-digit number 31425p99 is divisible by 9, then the maximum value of p is:
  5. Which of the following numbers is divisible by 87?
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