Question

If the number 27x5 is divisible by 9 then the largest digit to replace X is ?

Answer 1

Answer:

x=4

because the sum of 2+7+4+5 = 18

and 18 is divisible by 9 .

Step-by-step explanation:

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Answer 2

Answer:

Largest digit to replace X is 4.

Step-by-step explanation:

A number is divisible by 9, when sum of its digit is divisible by 9.

A digit is an element of a set that, taken as a whole, comprises a system of numeration. Thus, a digit is a number in a specific context. In the decimal (base-10) Arabic numbering system, the digits are the elements of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}.

Digit will lie between 0-9 hence ,

• 2+7+0+5= 14(not divisible by 9)
• 2+7+1+8= 15 ( not divisible by 9)
• 2+7+2+8 = 16(not divisible by 9)
• 2+7+3+8=17 (not divisible by 9)
• 2+7+4+8= 18( divisible by 9)
• 2+7+5+8= 19 (not divisible by 9)
• 2+7+6+8= 20 (not divisible by 9)
• 2+7+7+8= 21(not divisible by 9)
• 2+7+8+8= 22 (not divisible by 9)
• 2+7+9+8= 23(not divisible by 9).

hence the largest digit is 4.

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