40 cuarenta
50 cincuenta
60 sesenta
70 setenta
80 ochenta
90 noventa
100 cien
There are 40 odd numbers between 20 and 100. Remember that an odd number is every second number. There are 80 numbers between 20 and 100, so there are 40 odd numbers and 40 even numbers.
It is: 40 times 100 = 4000
If you count 40 and 100, there's 61. 100-40+1=61
5
30
100*40
40 of them including 51 and 100 38 without.
100 & 140. The two numbers are: the mean ± half the range. Half the range is 40/2 = 20. So the two numbers are: 120 - 20 = 100 120 + 20 = 140
If the product of the two numbers is the sum times 24, then the product of the two numbers is 2400. 40 times 60 is 2400, and 40 plus 60 is 100. The two numbers are 40 and 60.
An infinite lot of numbers: 51.23689752, for example.
There are 13 prime numbers from 40 to 100:41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89 and 97
40 palindromes.