Ans: step by step explanation for maths questions. try to get solution for your answer from the app i use mathqu in google play if you wish you can also download this app for instant maths answers here is link for the app to download
1 5 1
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1.yes it is a rational number as it can be written in the form of p/q.
2.yes natural numbers start from 1 so they can be expressed in the form of p/q. every rational number is not natural no as rational numbers include decimals and integers.
4.yes every real number is a natural number,because natural numbers are subset of real numbers.