The smallest number having four different prime factors is

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105

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210

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Solution

The correct option is D 210
As we need the smallest number possible having four different prime factors, we take the smallest possible prime numbers.
The smallest four prime numbers are 2, 3, 5 and 7.
Hence, the required number is $2 \times 3 \times 5 \times 7 = 210$

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Q. Which of the following numbers have 4 different prime factors?

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The smallest number having four different prime factors is

The correct option is D 210As we need the smallest number possible having four different prime factors, we take the smallest possible prime numbers. The smallest four prime numbers are 2, 3, 5 and 7. Hence, the required number is 2×3×5×7=210

The correct option is D 210
As we need the smallest number possible having four different prime factors, we take the smallest possible prime numbers.
The smallest four prime numbers are 2, 3, 5 and 7.
Hence, the required number is $2 \times 3 \times 5 \times 7 = 210$