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 Variations without repetition n = m = Vn,m= Variations with repetition n = m = VRn,m= Permutations n = Pn = Circular permutations n = (n-1)!= Combinations without repetition n = m = Cn,m= Combinations with repetition n = m = CRn,m=
 How many palindromic numbers can be formed using 6 figures? A palindromic number is one in which the set of figures in the first half of the number are repeated in reverse order in the second half. eg 1234321 Solution: