Natural numbers are 1,2,3 and so on. 13th and 23rd natural numbers are 13 an 23. Half the positive difference between 13th and 23rd natural numbers = (23-13)/2 = 5. 34th even natural number = 68 When half the positive difference between 13th and 23rd natural number added to 34th even natural number, result will be = 5+68 = 73.
