what will be the unit digit of the square of the following number? 54 with solution
Answers
Answered by
2
Answer:
6
Step-by-step explanation:
Six is the answer of square of 54
Answered by
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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