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numbers and algebraic expressions
logic, sets, intervals
absolute value
function and its properties
linear function
quadratic function
polynomials
rational function
exponential function
logarithm
number sequences
limits of sequences and functions
derivative and integral of functions
trigonometry
plane geometry
analytic geometry
solid geometry
combinatorics
probability
elements of statistics
kropki game
Digit on 2nd decimal place no increase because digit on 3rd decimal place 4 is smaller than 5. Digit on 2nd decimal place increase by 1 because digit on 3rd decimal place 6 is greater than 5. Digit on 2nd decimal place increase by 1 because digit on 3rd decimal place equal 5. Digit on 2nd decimal place increase by 1 because digit on 3rd decimal place 7 is greater than 5.