Final answer:
You would aim to hit the pins on the 1 and 3 spots to the right and left of the head pin to pick up the 1-2-4-9 spare in bowling.
Step-by-step explanation:
In the context of bowling, the 1-2-4-9 spare refers to a particular arrangement of pins left after the first ball is rolled. To pick up this spare, you would aim to hit the pins on the 1 and 3 spots to the right and left of the head pin respectively. By hitting both pins simultaneously with the ball, they will be deflected into the 4 and 9 pins, knocking them down as well.