State, whether the square of the following numbers is even or odd?

(i) 23 (ii) 54

(iii) 76 (iv) 75

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Solution

(i) 23 -odd (ii) 54- even

(iii) 76 -odd (iv) 75 -even

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Square of which of the following numbers will not have 6 at their unit's place :

(i) 35 (ii) 23

(iii) 64 (iv) 76

(v) 98

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