9 is greater than 6 and divisible by 3.
201
801
If the sum of its' digits are divisible by 3 for all numbers greater than 9.
25 is the number not less than 20, not greater than 40, not divisible by 2 3 or 7, and not a prime number.
It is 201 because 201/3 = 67
U={whole number greater than 10 but smaller than 30 } X={numbers divisible by 3 } Y Odd numbers
303................and there are many more...... 900 888
510
There is only one number that can be divisible by both 3 and 4 yet not greater than 20, 12.
852, 855, 858 and so on.
No number is less than 20 and greater than 40, but if you switch them around, your answer is 25.
The number is 2424 > 2024 < 3024 / 3 = 824 / 2 = 12