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Fractions and Ratios

A number is s...

Question

A number is said to be prime if it has exactly _____ factors.

Four

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Three

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Two

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One

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Solution

The correct option is C
Two

A number is said to be prime if it has exactly two factors (1 and the number itself).

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Similar questions

Any number with exactly four factors is a product of two distinct primes.

p

1

p

p^{2} - 1

2

p

p^{2} - 1

3

p

p (p + 1) (p + 2) (p + 3) + 1

Statement 1: If two numbers are co-primes, at least one of them must be prime.

Statement 2: If a number exactly divides the sum of two numbers, it must exactly divide the two numbers separately.

Statement 3: If a number exactly divides two numbers, then it must also divide the sum of both numbers.

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