Question

11
2
2
(a5)
Consider a number with unit digit 5, i.e., a5
= (10a + 5)
10a (10a + 5) + 5(10a + 5)
100a
100a (a + 1) + 25
= a (a + 1) hundred + 25
2
+ 50a + 50a + 25
ntaining 5 in unit's place.
(iv) 205 ​

Answer 1

Explanation:

205 is answer

hope its help uu