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Q: Sum of first 5 odd numbers?

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

You cannot. The sum of 5 odd numbers must be odd. 30 is not odd.You cannot. The sum of 5 odd numbers must be odd. 30 is not odd.You cannot. The sum of 5 odd numbers must be odd. 30 is not odd.You cannot. The sum of 5 odd numbers must be odd. 30 is not odd.

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.

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The sum of an odd number of odd numbers can't be an even number.

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

You cannot. The sum of 5 odd numbers must be odd.

There are no 5 odd numbers whose sum is 50. (The sum of 5 odd numbers is an odd number whereas 50 is an even number.)

You cannot. The sum of 5 odd numbers is always odd. 30 is not odd.

No 5 odd numbers add up to 100. The sum of any two odd numbers is even. The sum of any two even numbers is even. So the sum of any 4 odd numbers must be even. Take that and add an odd number and the sum must be odd. Therefore, the sum of any 5 odd numbers must be odd. 100 is even. In conclusion: The sum of any odd number of odd numbers is odd.

The sum of 5 odd numbers must be odd and 100 is even. So there cannot be such a set.

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