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Greatest Common Factor Calculator. Please provide numbers separated by comma , below and click the Calculate button to use. In mathematics, the greatest common divisor (GCD) is the largest positive integer that divides a group of numbers without a remainder. It is usually denoted by GCD(a, b, ...). Least common multiple is also called the greatest common factor (GCF), highest common factor (HCF), or greatest common measure (GCM). For example, since 20/10=2 and 30/10=3, GCD (20, 30) = 10.
The most commonly used formula is the 4-variable MDRD, which estimates GFR using four variables: serum creatinine, age, ethnicity, and gender. The original MDRD used six variables with the additional variables being the blood urea nitrogen and albumin levels.nother estimation tool to calculate GFR is the Mayo Quadratic formula. This formula was developed by Rule et al, in an attempt to better estimate GFR in patients with preserved kidney function. It is well recognized that the MDRD formula tends to underestimate GFR in patients with preserved kidney function.