Answer :

(i) 85


Since 85 terminates with 5.


8 × (8 + 1)


8 × 9 = 72


So, 852 = 7225


(ii) 115


Since 115 terminates with 5.


11 × (11 + 1)


11 × 12 = 132


So, 1152 = 13225


(iii) 165


Since 165 terminates with 5.


16 × (16 + 1)


16 × 17 = 272


So, 1652 = 27225


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