Separate XL into two parts (XL) and (VII). Work on them separately, but remember that you must add them again at the end.
XL means X many before L, where X is 10 and L is 50. Therefore XL means 10 before 50, or 40.
VII means V plus I plus I, where V is 5 and I is 1. Therefore VII means 5 plus 1 plus 1, or 7.
So adding the two quantities together, 40 plus 7 is 47.
XLVII is 47 in cardinal numbers.
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the set of real numbers are the numbers which make the entire number system. they include all the different number systems like integers,rational numbers,irrational numbers,whole numbers & natural numbers.
Integers are whole numbers. They are the counting numbers, 0 and the corresponding negative numbers. Rational numbers are numbers that can be expressed as a ratio of two integers (the second one being non-zero). Irrational numbers are numbers that are not rational numbers. Rational and irrational number together form the set of real numbers.