Solve using the guess-and-test strategy. . the math club has 57 members who are in sixth or seventh grades. there are twice as many sixth graders as seventh graders. . how many sixth graders are in the club? . a.. 38. b.. 37. c.. 19. d.. 18

The guess-and-test strategy may be made easier by using the choices.
A. 38 sixth graders   > 57 - 38 = 19 . There are 19 seventh graders. This option already satisfy the condition that the number of sixth graders should be twice that of the seventh graders. There is no need to test for the remaining choices. The answer is letter A.