Multiple choice general knowledge math & puzzles Find the smallest number in a GP whose sum is 38 and product 1728 12 20 6 8 Reveal answer Fill a bubble to check yourself D Correct answer Explanation Let the terms be a/r, a, ar. Product: a^3 = 1728, so a = 12. Sum: 12/r + 12 + 12r = 38. Solving 12/r + 12r = 26 gives 6r^2 - 13r + 6 = 0. Roots are 3/2 and 2/3. The terms are 8, 12, 18. Smallest is 8.