Math, asked by khusisaroj789, 1 day ago

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

Answers

Answered by sameerausman67
2

Answer:

6

Step-by-step explanation:

Six is the answer of square of 54

Answered by YourHelperAdi
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

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