Find the squares of these numbers:

(i) 30

(ii) 400

(iii) 7000

(iv) 6 × 10²⁵

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Solution

(i) Square of 30 = (30)² = 30 × 30 = 900

(ii) Square of 400 = (400)² = 400 × 400 = 160000

(iii) Square of 7000 = (7000)² = 7000 × 7000 = 49000000

(iv) Square of 6 × 10²⁵ = (6 × 10²⁵)² = 6 × 10²⁵ × 6 × 10²⁵ = 36 × 10⁵⁰

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