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What is the least number that should be added to the product 7 × 8 × 9 × 10 to make it a perfect square?
- A144
- B1
- C289
- D3
Answer not set
Discussion 1
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CCommunity
To make perfect square
⇒ 7 × 8 × 9 × 10
⇒ 7 × 2 × 2 × 2 × 3 × 3 × 2 × 5
⇒ 7 × 5 = 35 is not a perfect square and we know 36 is a perfect square.
So, we add 1 in 35 to make perfect square.
⇒ 7 × 8 × 9 × 10
⇒ 7 × 2 × 2 × 2 × 3 × 3 × 2 × 5
⇒ 7 × 5 = 35 is not a perfect square and we know 36 is a perfect square.
So, we add 1 in 35 to make perfect square.