Question

what will be the unit digit of the square of the following number? 54 with solution​

Answer 1

Answer:

6

Step-by-step explanation:

Six is the answer of square of 54

Answer 2

To find :

unit digit in the square of 54

Solution :

1] method 1 (short method)

• take the last digit of the number given ;

here it is 4

• find the square of that number ;

4² = 16

• the unit digit of the square found (ie 6) is the required number
• means, 54² has 6 at its unit digit

2] method 2 [long method ]

• take the required number
• find the square of that number by calculation or using identity.

here, 54² = (50+4]²

= 50²+4²+2(50×4)

= 2500+16+400

= 2916

• take the unit digit of the found square ( ie 6]
• 6 is the required unit digit of 54²