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Why do we sometime round up or down numbers?
Sometimes you round up or round down numbers to get close to the correct answer so that you can make sure that your answer is right. If your answer is not close to the rounding down of the numbers you are using then you need to look it over and do it again.
Have these numbers ever come up on the lottery 2 19 21 23 33 43?
It doesn't really matter. The lottery won't look at past numbers to make them appear again, or to not make them appear again. Therefore, no matter how often a number - or a group of numbers - appeared in the past, that won't affect the probability of those numbers appearing on the next lottery.
What is this triangle 78 42?
78 42 are, as far as I can make out, two numbers. They do not make a triangle.78 42 are, as far as I can make out, two numbers. They do not make a triangle.78 42 are, as far as I can make out, two numbers. They do not make a triangle.78 42 are, as far as I can make out, two numbers. They do not make a triangle.
Why is it important to reduce fractions to simplest form?
To make the numbers involved in the ratio smaller and therefore (possibly) easier to comprehend. It also keeps teachers, schools and examiners happy ;). At the same time, we spend a lot of effort looking for similar fractions. Finding percentages, for example, are instances when we are moving away from reducing fractions. For addition and subtraction of fractions we need to look for similar fractions which, again, is a move in the opposite direction.
How can you make the numbers using 4 numbers?
1234
