Question
If 'x' is the lowest positive integer divisible by 16,
18 and 20, then find the second smallest positive integer which is divisible by all the three given numbers?Solution
Lowest positive integer divisible by 16, 18 and 20 = LCM (16, 18, 20) So, LCM of (16, 18, and 20) = 2⁴ × 3² × 5¹ = 720 Therefore, the next larger number which is divisible by all the three given numbers = 2 × 720 = 1440
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