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71113 + 13 = 71126 which is a composite number.

7654321 + 5 = 7654326 which is a composite number.

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Q: Are the numbers 71113 plus 13 and 7654321 plus 5 composite?
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Explain why 71113 plus 13 and 7654321 plus 5 are composite numbers?

71113 + 13 = 71126 7654321 + 5 = 7654326 Both can be divided by numbers other than 1 and itself. Hence both are composite.


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The first number is odd, the second is odd. Odd + Odd = Even ie the sum is even. Either number is greater than 2 so their sum is greater than 2. All even numbers greater than 2 are composite.


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5+5+8+111+9+7654321=7654459Every operation in this problem is addition. This means that all the adding can be done in one step.


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8 + 16 = 24. 24 is a composite number because it is divisible by numbers other than 1 and itself. For example, it is an even number, which means it is divisible by 3.


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Is 2X3X5X13X17 plus 13 a composite number?

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