Which of the following will have 1 at its units place?
a. 19²
b. 17²
c. 18²
d. 16²

Solution:

We have to find the value which will have 1 at its units place.

Considering 19²

19² = 19 × 19 = 361

Considering 17²

17² = 17 × 17 = 289

Considering 18²

18² = 18 × 18 = 324

Considering 16²

16² = 16 × 16 = 256

We know that the square of a number having 1 or 9 at the unit's place ends in 1.

Therefore, 19² will have 1 at its unit’s place.

✦ Try This: Which of the following will have 1 at its units place? a. 21², b. 16², c. 17², d. 15²

☛ Also Check: NCERT Solutions for Class 8 Maths

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NCERT Exemplar Class 8 Maths Chapter 3 Sample Problem 2

Which of the following will have 1 at its units place? a. 19², b. 17², c. 18², d. 16²

Summary:

19² will have 1 at its unit’s place.

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☛ Related Questions:

• How many natural numbers lie between 18² and 19²? a. 30, b. 37, c. 35, d. 36
• Which of the following is not a perfect square? a. 361, b. 1156, c. 1128, d. 1681
• A perfect square can never have the following digit at one’s place. a. 1, b. 6, c. 5, d. 3