Multiple choice general knowledge math & puzzles The true discount on a bill of Rs. 540 is Rs. 90. The banker's discount is: 60 108 110 112 Reveal answer Fill a bubble to check yourself B Correct answer Explanation True Discount (TD) = 90, Amount (A) = 540. Present Worth (PW) = A - TD = 540 - 90 = 450. Banker's Discount (BD) is the simple interest on the face value (A), while TD is the interest on PW. BD = (TD * A) / PW = (90 * 540) / 450 = 108.