2
They are 7 and 5.
11 is divisible by 11.11 times 2 is 22.11 < 2211 is deficient.13 is divisible by 4 and 13.The sum of 4 and 13 is 17.13 times 2 is 26.17 < 2613 is deficient.and so on...You just see what goes into the number (in this example, we use the numbers 11 and 13), then add them all together. Then you multiply the number you're investigating with 2, and if the result of this is greater than the sum, it is deficient.Let's check 12 (which is not deficient):12 is divisible by 2, 3, 4, 6, and 12The sum of 2, 3, 4, 6, and 12 is 2712 times 2 is 2424 < 27The sum is greater, so 12 is not deficient.
8n + 2
1st number=12 2nd number=24
2
They are 7 and 5.
11 is divisible by 11.11 times 2 is 22.11 < 2211 is deficient.13 is divisible by 4 and 13.The sum of 4 and 13 is 17.13 times 2 is 26.17 < 2613 is deficient.and so on...You just see what goes into the number (in this example, we use the numbers 11 and 13), then add them all together. Then you multiply the number you're investigating with 2, and if the result of this is greater than the sum, it is deficient.Let's check 12 (which is not deficient):12 is divisible by 2, 3, 4, 6, and 12The sum of 2, 3, 4, 6, and 12 is 2712 times 2 is 2424 < 27The sum is greater, so 12 is not deficient.
Let x represent the number. 2 times the number would be 2x, and 5 times the number would be 5x. The sum of the two would be 2X + 5x = 7x
The equation would look like this: 2(x+6)
Eighteen
8n + 2
1st number=12 2nd number=24
The sum of a whole number and a fraction is a mixed number.
The answer is 24.
3x+2
18. The sum of its digits is 9. And yes, it is unique.