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Q: What is the sum of the first 9 odd numbers?

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The first three odd numbers are 1, 3, and 5. Their sum is 1 + 3 + 5 = 9.

The sum of 9 odd numbers must be odd and so cannot be an number.

9801 * The sum of the first two odd numbers (1+3) is 4, or 22 * The sum of the first three odd numbers (1+3+5) is 9, or 32 * The sum of the first four odd numbers (1+3+5+7) is 16, or 42 * ...and so on So the sum of the first 99 odd numbers, using the pattern above, would be 992 or 9801.

the sum of the first three numbers is 1 + 3+5= 9

You cannot. The sum of 9 odd numbers must be odd.

6 9 11 23

1 ,3, 5, 7 ,9......, 77, 79. Sum of first 40 odd numbers is 1600. This is the answer

Not possible ! If you add an odd number of odd numbers together, the result will ALWAYS be odd !

1+3+5+7+9=25

9 and 11

The numbers are 5, 7 and 9.

You can work this out by realizing that the sum of the first x odd numbers is equal to x2.Consider the following examples:The first three odd numbers: 1 + 3 + 5 = 9The first five odd numbers: 1 + 3 + 5 + 7 + 9 = 25The first ten odd numbers: 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 = 100In each case, the number of odds you're adding together is the square root of their sum. This means that the first 1500 consecutive odd numbers have a sum of 15002, which equals 2250000, or two and a quarter million.

Answer is 4000000: The sum of the first N odd numbers is N^2. Look at 1,3,5 for example. There are 3 numbers and the sum is 9 which is 3^2. Add 7 and the sum is 16 which is 4^2. So the of the first 2000 consecutive odd numbers is 2000^2 Note 2000 is 2(10^3). When we square that it is 4x10^6=4000000

1, 3, 5, 7, 9, 11 are six consecutive odd numbers whose sum is 36

7, 9 & 11.

1+3+5+7+9 = 25

An odd number of odd numbers can't add up to an even number.

5*9= 45

1 + 3 + 5 = 9

1, 3 and 9

They are 9, 11 and 13.

Because the sum of the first N odd numbers is always N squared. Look at 5, 7, and 9. This is 5+7+9 = (1 + 3 + 5 + 7 + 9)-(1+3)= 25-4 =5^2 - 2^2

Must be the 2 odd numbers, 9 & 15 (P = 135, S = 24)

The sum of 9 odd numbers will be odd and so cannot be 50.

9 and 7.