GCF (HCF) of 9 and 25

"Greatest Common Factor" Calculator
Greatest Common Factor of
and

What is the Greatest Common Divisor of 9 and 25?

Answer

GCF (HCF) of 9 and 25 is
1

Common factors: 1

Only 1 divides both: 9 and 25 share no prime factor.

Such numbers are called coprime (relatively prime); their LCM is just the product: 9 × 25 = 225.

9 = 32

25 = 52

Prime925Lowest power
332——
5—52—

— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.

GCF = 1

More with these numbers

Related Calculations

See Also

GCF Table

Number 1Number 2GCF
981
9101
9111
9123
9131
9141
9153
9161
9171
9189
9191
9201
9213
9221
9243
9251
9261
9279
9281
9291
9303
9341
9351
9369
9393
9401
9423
9459
9461
9483

FAQ

What is the Greatest Common Divisor of 9 and 25?

GCF (HCF) of 9 and 25 is 1

How to find the GCF of 9 and 25?

You can find the GCF of 9 and 25 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 9 and 25 is 1.

What prime factors do 9 and 25 share?

9 and 25 have no prime factor in common, so the only integer that divides both of them is 1 and their GCF is 1.

How does the GCF reduce the fraction 9/25?

Divide the numerator and the denominator by the GCF 1: 9 ÷ 1 = 9 and 25 ÷ 1 = 25. So 9/25 in lowest terms is 9/25.

Are 9 and 25 coprime?

Yes, 9 and 25 are coprime (relatively prime) because their Greatest Common Factor is 1.

See Also