6, 18, 30, 42, 54, 66, 78, 90
Perfect squares have odd numbers of factors. The perfect squares less than 100 are: 1,4,9,16,25,36,49,64,81,100. 64 seems to fit both criteria.
== == 11 22
65
-13 is an odd number which is less than 5.
No, and we doubt that you can either.
There are nine.
It is: 3 plus 97 = 100
There are 9 integers less than 100 that have an odd number of factors.Every factor of a number has a pair, eg 2 & 3 are a factor pair of 6; and so it would be expected that every number has an even number of factors.However, if the factor pair of a number are the same number (eg 6 & 6 are a factor pair of 36), then there will be an odd number of factors.When there is a repeated factor like this, the number is a perfect square.Thus only perfect squares have an odd number of factors.Less than 100 there are 9 perfect squares (1, 4, 9, 16, 25, 36, 49, 64 & 81) which have an odd number of factors.100 itself is a perfect square and also has an odd number of factors, but the question asked for those numbers less than 100 with an odd number of factors.
To find the number of whole numbers less than 100 that are 10 greater than an odd whole number, we can set up an equation. Let x represent the odd whole number. Therefore, the number that is 10 greater than x is x + 10. Since x is odd, it can be represented as 2n + 1, where n is a non-negative integer. Substituting this into the equation x + 10 = 2n + 1 + 10, we get 2n + 11. To find the number of such numbers less than 100, we need to find the largest possible value of n such that 2n + 11 < 100. Solving for n, we get n < 44.5, which means the largest possible integer value for n is 44. Therefore, there are 45 odd whole numbers less than 100 that are 10 greater than an odd whole number.
64
The most factors any odd number less than 100 has is 6. There are 4 numbers which have 6 factors:45, 63, 75 & 99.
1st odd number . . . 1 (1 less than double 1)2nd odd number . . . 3 (1 less than double 2)3rd odd number . . . 5 (1 less than double 3)4th odd number . . . 7 (1 less than double 4)5th odd number . . . 9 (1 less than double 5)Are you seeing a pattern yet ?6th odd number . . . 11 (1 less than double 6)7th odd number . . . 13 (1 less than double 7)...Qth odd number . . . . (1 less than double Q)