Which of the following cannot be a perfect square?
a. 841
b. 529
c. 198
d. All of the above

Solution:

We have to find the number which is not a perfect square.

The unit digit of a perfect square can be only 0, 1, 4, 5, 6 or 9.

841 has unit digit as 1

This implies 841 is a perfect square

529 has unit digit as 9

This implies 529 is a perfect square

198 has unit digit as 8

Since, the unit digit of a perfect square cannot be 8.

Therefore, 198 is not a perfect square.

✦ Try This: Which of the following cannot be a perfect square? a. 225, b. 529, c. 201, d. All of the above

☛ Also Check: NCERT Solutions for Class 8 Maths

NCERT Exemplar Class 8 Maths Chapter 3 Problem 6

Which of the following cannot be a perfect square? a. 841, b. 529, c. 198, d. All of the above

Summary:

198 cannot be a perfect square

☛ Related Questions:

• The one’s digit of the cube of 23 is, a. 6, b. 7, c. 3, d. 9
• A square board has an area of 144 square units. How long is each side of the board? a. 11 units, b. . . . .
• Which letter best represents the location of 25 on a number line? a. A, b. B, c. C, d. D