TASK DEFINITION: In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
PROBLEM: Problem: calculate how many seconds it will take for 4 bells to toll together again , given that they begin to toll together respectively at the intervals of 9 , 10 , 14 and 18 seconds . ?
Options: a ) 636 , b ) 631 , c ) 633 , d ) 610 , e ) 630

SOLUTION: e

PROBLEM: Problem: find the annual income derived by investing $ 6800 in 30 % stock at 136 .
Options: a ) 550 , b ) 1500 , c ) 250 , d ) 1300 , e ) 400

SOLUTION: b

PROBLEM: Problem: running at the same rate , 8 identical machines can produce 560 paperclips a minute . at this rate , how many paperclips could 15 machines produce in 6 minutes ?
Options: a ) 1344 , b ) 6300 , c ) 8400 , d ) 50400 , e ) 67200

SOLUTION:
b