Well, for every 10 numbers there are 5 even numbers (2,4,6,8,10). So if you include beginning and ending numbers, the even numbers from from 100 to 150 are:
There are 26 numbers from 100 to 150. To determine how many of them are even, we need to consider that the last digit of an even number is always 0, 2, 4, 6, or 8. In this range, the even numbers are 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 130, 132, 134, 136, 138, 140, 142, 144, 146, and 148. There are a total of 25 even numbers in this range.
250
50
The numbers are -150 and -148.
Infinitely many. There are infinitely many numbers between any two numbers. So, for example, cosidering only the numbers that round up, there are an infinitely many numbers between 149.999 and 150, all of which would round to 150. And there are another infinity between 149.5 and 149.999 which, to the nearest unit would round to 150. If you are rounding to the nearest 10, all the numbers between 145 and 150 would also round to 150. In all cases you must also consider the numbers that are rounded down to 150.
100 + 50
The even numbers of 150 are: 2,6,10,30,and 50
100
150 (half, the other half are odd numbers)
250
The range of these three numbers is equal to 150 - 50 = 100
100 + 50
100+25+25 = 150
The least common multiple of the numbers 450, 180, 100 and 150 is 900.
An infinite number of numbers would round to 150.
50
The numbers are -150 and -148.
To find the two numbers you need to add to get 150, you can set up an equation: x + y = 150. Since you are looking for two numbers, there are infinite pairs that satisfy this equation. For example, 100 + 50 = 150, or 75 + 75 = 150. The key is to understand that there are multiple correct answers to this question.