Answer

Verified

401.7k+ views

**Hint:**In order to solve this question we have to check the square of the number that is present in the unit place of the number.

**Complete step-by-step answer:**

A) Solution for $9801$

In the given number $9801$, $1$is in the unit place so we have to check the square number of $1$, that is,${1^2} = 1$. Now we have to check other numbers whose square number has one in the unit place, that number is $9$ because ${9^2} = 81$. So the possible one’s digit must be either $1$ or $9$

**1 and 9 are the possible one’s digit.**

B) Solution for $99856$

In the given number $99856$, $6$ is in the unit place so we have to check the square number of ${6^2} = 36$. Now we have to check other numbers whose square number has six in the unit place, that number is ${4^2} = 16$. So the possible one’s digit must be either $4$ or $6$

**4 and 6 are the possible one’s digit.**

C) Solution for $998001$

In the given number $998001$, $1$ is in the unit place so we have to check the square number of $1$, that is,${1^2} = 1$. Now we have to check other numbers whose square number has one in the unit place, that number is $9$ because ${9^2} = 81$. So the possible one’s digit must be either $1$ or $9$

**1 and 9 are the possible one’s digit.**

D) Solution for $657666025$

In the given number $657666025$, $5$ is in the unit place so we have to check the square number of $5$ that is $25$. Now we have to check other numbers whose square number has $5$ in the unit place, but there is no such number except $5$ whose square number has $5$ in the unit place.

**5 is the possible one’s digit.**

**Note:**It is to be noted that the unit place digit must be from $1$ to $9$ as it is a single digit so one must calculate the square of those digits. In many cases it happens that students also check other digits $10$, $11$ or any other number which is not needed and it is time-consuming too and for this calculation mistakes might take place.

Recently Updated Pages

What are the Advantages and Disadvantages of Algorithm

How do you write 0125 in scientific notation class 0 maths CBSE

The marks obtained by 50 students of class 10 out of class 11 maths CBSE

You are awaiting your class 10th results Meanwhile class 7 english CBSE

Which one of the following was not the cause of the class 10 social science CBSE

Which one of the following cities is not located on class 10 social science CBSE

Trending doubts

Difference Between Plant Cell and Animal Cell

Mention the different categories of ministers in the class 10 social science CBSE

Fill the blanks with the suitable prepositions 1 The class 9 english CBSE

Give 10 examples for herbs , shrubs , climbers , creepers

Who is the executive head of the Municipal Corporation class 6 social science CBSE

Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE

Which monarch called himself as the second Alexander class 10 social science CBSE

Select the word that is correctly spelled a Twelveth class 10 english CBSE

Write an application to the principal requesting five class 10 english CBSE