Question

2. What will be the units digit in the square of the following numbers?a) 679 b) 562 c) 873​

Answer 1

Answer:

it is so easy

(a)679

unit digit in this number is 9

so square of 9 will be 81

so in this number 1 is at unit digit so 1 is the answer

Answer 2

Answer:

(a)The units digit in the square of 679 is 1.

(b)The units digit in the square of 562 is 4.

(c)The units digit in the square of 873 is 9.

Step-by-step explanation:

(a) 679

• The unit digit of the square of 679 will be same as the unit digit of the square of 9.

• Now $9^{2}$=81, unit digit is 1.

       so the unit digit of the square of 679 , i.e. $679^{2}$ is 1

(b) 562

• The unit digit of the square of 562 will be same as the unit digit of the square of 2.
• Now , $2^{2}$ = 4,

       so the unit digit of the square of 562 i.e.  $562^{2}$  is 4.

(c) 873​

• The unit digit of the square of 873 will be same as the unit digit of the square of 3.
• Now , $3^{2}$ = 9,

       so the unit digit of the square of 873 i.e.  $873^{2}$  is 9.