The last digit in the product of the first 20 odd natural numbers can be determined by looking at the pattern of the units digit in the multiplication of consecutive odd numbers. The units digit of the product of consecutive odd numbers alternates between 1 and 5. Since there are 10 odd numbers between 1 and 19, and 20 is also an odd number, the last digit in the product of the first 20 odd natural numbers is 5.
36
Yes. Basic rule is two odds make an even, two evens make an even, an even and an odd make an odd. And note that any two consecutive numbers include exactly one odd and one even. Or more directly, if you start at number n you will add it to n+1 giving 2n+1. Since 2n is even, 2n+1 is odd.
55 is an odd number. Odd numbers end in 1, 3, 5, 7, or 9. Even numbers end in 0, 2, 4, 6, or 8.
over 50
201
201
200*50=10000
The sum of all odd numbers 1 through 99 is 9,801.
200
There are 100 odd numbers between 1 and 199. This can be calculated by dividing the total range (199 - 1 = 198) by 2, as odd numbers are spaced every two integers. Therefore, 198 divided by 2 equals 99, representing half of the odd numbers in the range. Multiplying this by 2 gives us the total count of odd numbers, which is 100.
The sum of all the numbers 1 through 200 is 20,100.
The sum of all the odd numbers from 1 through 100 is 10,000
First odd number greater than 20 is 21 Last odd number less than 200 is 199 → number of odd numbers between 20 and 200 is (199 - 21) ÷ 2 + 1 = 90
100
201
The odd numbers between 1 and 19 are: 1 3 5 7 9 11 13 15 17 19