Question

e) Evaluate!
225-169
(f) Find the smallest 4-digit number which is a perfect square
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Answer 1

$\huge\mathfrak{\underline{\underline{\red{Answer:-}}}}$

e) 56

f) 1000

Answer 2

Answer:

E )   2

F)  1024

Step-by-step explanation:

 

1) √ 225 - √169  =  15 - 13   ( as the square root of 225 is 15 and square root of 169 is 13 )

= 15- 13 =2

therefor 2 is the answer

2) the smallest 4 digit number is 1000

we have to use long division method to see whether 1000 is a perfect square or not .  As the quotient of 1000  = 31 and the reminder is 100

              $31^{2}$   >   1000 >  $32^{2}$

              $32^{2}$ = 1024

             =  1024-1000

              = 24

therefor the smallest  4-digit number which is a perfect square is 1024

   

HOPE THIS HELPS YOU