Question

2) What will be the unit digit of the squares of the following numbers?
a)21 b) 132
b) 132 c) 343 d) 456 e) 257 d) 148





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Answer 1



 

 



• A natural number is called a perfect square if it is the square of

some natural number.

i.e., if m = n2, then m is a perfect square where m and n are natural

numbers.

• A natural number is called a perfect cube if it is the cube of some

natural number.

i.e., if m = n3, then m is a perfect cube where m and n are natural

numbers.

• Number obtained when a number is multiplied by itself is called

the square of the number.

• Number obtained when a number is multiplied by itself three times

are called cube number cube number.

• Squares and cubes of even numbers are even.

• Squares and cubes of odd numbers are odd.

• A perfect square can always be expressed as the product of pairs of

prime factors.

• A perfect cube can always be expressed as the product of triplets

of prime factors.



12/04/18

Answer 2

Step-by-step explanation:

if we multiply the unit digit two times we will get the answer

a. 1

b. 4

c. 9

d. 6

e. 9

f. 4

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