Question

Which of the following numbers will not have 1 (one) at their unit's place :

(i) ${32}^2$ (ii) $({57}^2$

(iii) $({69}^2$ (iv) $({321}^2$

(v) ${265}^2$

Answer 1

The square of the following numbers will not have 1 at their units place : as only $(1{)}^2=1,(9{)}^2=81$ have 1 at then units place

${32}^2,{57}^2,{265}^2$

i,e., (i), (ii) and (v)