Health Department Mathematics MCQs NTS Past Papers Vaccinator Complete the Series: 21,9,21,11,21,13,21,_______ August 5, 2023 Admin No Comments A: 14 B: 15 C: 21 D: 23 Correct Answer: B Short Details: 21-12=09 21-10=11 21-8=13 21-6=15 View More Details >>
