Question : What is the smallest perfect square number that is divisible by both 10 and 15?
Option 1: 1200
Option 2: 1800
Option 3: 360
Option 4: 900
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Correct Answer: 900
Solution : Given: The number is divisible by both 10 and 15. Finding the lowest multiple of two or more numbers is done using the LCM method. LCM of 10 and 15 = 30 The prime factors of 30 = 2 × 3 × 5 Make it a perfect square number, 30 × 2 × 3 × 5 = 900 Hence, the correct answer is 900.
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