1.      How many non isomorphic simple graphs are there with four vertices

1.      The number of edges in Q₅ is

1.      How many subgraphs with at least one vertex does W₃ have?

1.      If G(x) is the generating function for the sequence {a_k} then what is the generating function for a_o, a₀+a₁, a₀+a₁+a₂, …….

1.      Find f(n) when n=4^k, where f satisfies the recurrence relation f(n) = 5f(n/4)+6n with f(1) =1

Mire hajlamosak a magas fokszámú polinomok?

1.      Find the big O estimate for the number of multiplications required to compute xⁿ where x is real number and n is a positive integer.

1.      For the function f(n) = 2 f(n^0.5) + log n when n is perfect square greater than 1 and f(2) =1, the big O estimate of f(n) is