This Quicksilver was an early radio game show.
NBC Red (Weekly): 6/27/1939 – 9/26/1939
NBC Blue (Weekly): 10/11/1939 – 4/17/1940
A microphone was concealed somewhere at a busy locale. A random person was approached and asked to answer a riddle that was submitted by a listener (who received $5). The participant received $5 as well if he/she correctly answered the riddle; otherwise, he/she received a silver dollar as a consolation prize.