Question 3

Write the correct answer from the given four options.

A number ending in 9 will have the unit's place of its square as

a) 3
b) 9
c) 1
d) 6

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Solution

We know that, if a number is ending in 1 or 9 in the unit's place, then its square ends in 1.
The number ending in 9, will have the unit's place of its square as 1. $[∵ 9 \times 9 = 81]$

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Similar questions

Write the correct answer from the given four options.

A number ending in $9$ will have the unit's place of its square as

a) $3$
b) $9$
c) $1$
d) $6$

Question 7

Write the correct answer from the given four options.

The one's digit of the cube of 23 is

a) 6
b) 7
c) 3
d) 9

Question 16

Out of the four options, only one is correct. Write the correct answer.

The length of a side of a square is given as 2x + 3. Which expression represents the perimeter of the square?

(a) 2x+16
(b) 6x+9
(c) 8x+3
(d) 8x+12

Question 20

In the following question, out of the four options, only one is correct. Write the correct answer:

$(- 9)^{3} \div (- 9)^{8}$ is equal to:
(a) $(9)^{5}$
(b) $(9)^{- 5}$
(c) $(- 9)^{5}$
(d) $(- 9)^{- 5}$

Question 20

In the following question, out of the four options, only one is correct. Write the correct answer:

$(- 9)^{3} \div (- 9)^{8}$ is equal to:
(a) $(9)^{5}$
(b) $(9)^{- 5}$
(c) $(- 9)^{5}$
(d) $(- 9)^{- 5}$

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