# Practice Greatest Common Factor (GCF) - normal

GCF is the highest number that divides two or more numbers. It is the "greatest" thing for simplifying fractions!

Greatest Common Factor practice helps to train mental skills for two numbers.

# Practice Greatest Common Factor (GCF) - advanced

Practice the Greatest Common Factor skill for two or three numbers.

## Progress report

The report shows the learning progress in percentage (0% - not learned, 100% - learned well).
There are three levels of the report.

### Short report

GCF normal (two numbers): 51%

### Normal report

The normal report shows progress for two or three numbers family. For example GCF(x1,x4) is a family consisting of GCF(1,4), GCF(2,8), GCF(3,12), ...
GCF(x1,x2,x4) is GCF(1,2,4), GCF(2,4,8), GCF(3,6,12), ...

GCF normal. Done: 51%

 GCF(x1,x2) 52% GCF(x1,x3) 53% GCF(x1,x4) 55% GCF(x1,x5) 61% GCF(x1,x6) 61% GCF(x1,x7) 49% GCF(x1,x8) 66% GCF(x1,x9) 45% GCF(x1,x10) 43% GCF(x2,x3) 53% GCF(x2,x5) 61% GCF(x2,x7) 56% GCF(x2,x9) 37% GCF(x3,x4) 51% GCF(x3,x5) 46% GCF(x3,x7) 39% GCF(x3,x8) 57% GCF(x3,x10) 56% GCF(x4,x5) 40% GCF(x4,x7) 58% GCF(x4,x9) 55% GCF(x5,x6) 37% GCF(x5,x7) 34% GCF(x5,x8) 60% GCF(x5,x9) 48% GCF(x6,x7) 37% GCF(x7,x8) 43% GCF(x7,x9) 53% GCF(x7,x10) 56% GCF(x8,x9) 65% GCF(x9,x10) 52%

 GCF(x1,x2,x3) 15% GCF(x4,x2,x3) 17% GCF(x1,x2,x4) 12% GCF(x2,x3,x5) 8% GCF(x1,x2,x5) 15% GCF(x1,x2,x6) 12% GCF(x2,x6,x3) 7% GCF(x2,x4,x5) 8% GCF(x1,x3,x4) 15% GCF(x1,x3,x5) 15% GCF(x1,x3,x6) 15% GCF(x3,x4,x5) 5% GCF(x3,x6,x4) 12% GCF(x5,x4,x6) 12%

### Detail report

The Greatest Common Factor - two numbers.

Hover the pointer over the grid chart to view the tooltip with the facts description.

123456789101112
GCF(x1,x2)
GCF(x1,x3)
GCF(x1,x4)
GCF(x1,x5)
GCF(x1,x6)
GCF(x1,x7)
GCF(x1,x8)
GCF(x1,x9)
GCF(x1,x10)
GCF(x2,x3)
GCF(x2,x5)
GCF(x2,x7)
GCF(x2,x9)
GCF(x3,x4)
GCF(x3,x5)
GCF(x3,x7)
GCF(x3,x8)
GCF(x3,x10)
GCF(x4,x5)
GCF(x4,x7)
GCF(x4,x9)
GCF(x5,x6)
GCF(x5,x7)
GCF(x5,x8)
GCF(x5,x9)
GCF(x6,x7)
GCF(x7,x8)
GCF(x7,x9)
GCF(x7,x10)
GCF(x8,x9)
GCF(x9,x10)

### The Greatest Common Factor - advanced

Hover the pointer over the grid chart to view the tooltip with the facts description.

123456789101112
GCF(x1,x2,x3)
GCF(x4,x2,x3)
GCF(x1,x2,x4)
GCF(x2,x3,x5)
GCF(x1,x2,x5)
GCF(x1,x2,x6)
GCF(x2,x6,x3)
GCF(x2,x4,x5)
GCF(x1,x3,x4)
GCF(x1,x3,x5)
GCF(x1,x3,x6)
GCF(x3,x4,x5)
GCF(x3,x6,x4)
GCF(x5,x4,x6)