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Q: How many Odd numbers from 1 to 49?

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49 is an odd number. All numbers ending in 1, 3, 5, 7, or 9 are odd numbers.

1 + 3 + 5 + ... + 49 = ((49 + 1)/2)2 = 625

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

26

It is not possible for five odd numbers to add up to 50 or any even number.

There are 15 prime numbers between 1 and 49

201

71

Thirteen.

Square numbers: 1, 4, 9, 16, 25, 36, 49, 64, 81, 100

They are: 1+3+5+7+9+11+13 = 49

34

All the numbers above 2 that are the squares of odd primes have exactly 3 factors: 1, the odd prime, and the odd prime squared. 4, 9, 25, 49, 81, 121,...

odd multiples of 7 are odd numbers.. like 7*1, 7*3,7*5..

Numbers from 1-6 that are odd numbers are 1, 3, and 5.

201

Only 1/7 of odd numbers divide by seven, so 6/7 of them do not. That makes about infinity odd numbers altogether.

There are 136 odd number between 1 and 275.

Three: 1, 7, 49.

There are 11 numbers between 1 and 130 that have an odd number of factors: 1,4,9,16,25,36,49,64,81,100,121.

25

37

Infinity

25.

250 of them.

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