MATH- 100 most common questions and answers rated A+

MATH- 100 most commonprecent increase/decrease formulas percent increase= amt of increase/OG whole percent decrease= amt of decrease over og whole Multiples of 2,3,4,5,6,9,10,12 2: last digit even 3: sum of digits is multiple of 3 4: last two digits are a multiple of 4 5: last digit is 5 or 0 6: sum of digits is a multiple of 3, and the last digit is even 9: sum of digits is multiple of 9 10: last digit is 0 12: sum of digits is a multiple of 3 and last two digits are a multiple of 4 Read More Find a common factor of 2 numbers break both numbers down to prime factors to see which they have in common. Then multiply the shared prime factors. how to find the least common multiple of two numbers find prime factorization of each number, then seeing the greatest number of times each factor is used. Multiply each factor the greatest number of times it appears how to count consecutive terms the number of integers from A to B inclusive: B-A+1 how to find the sum of consecutive numbers sum= (average) x (number of terms) how to use actual numbers to determine a ratio put number associated with of on the top and the word associated with to on the bottom ratio= of/to how to count the number of possibilities n! how to calculate a simple probability probability= number of favorable outcomes/ total number of possible outcomes how to solve for one variable IN TERMS OF ANOTHER to find x "in terms of" y, isolate x on one side, leaving y as the only other variable on the other