Question 20
Hạnh rolls a four-sided (tetrahedral) die with faces numbered 1, 2, 3 and 4, and moves a playing piece as follows:
• An even result moves the piece forward by the number shown.
• An odd result moves it backward by the number shown.
She rolls 42 times and the piece travels 102 steps in total, counting both forward and backward steps. The number of 2s equals the number of 4s, and the number of 1s is twice the number of 3s. How many forward steps are taken altogether?
• An even result moves the piece forward by the number shown.
• An odd result moves it backward by the number shown.
She rolls 42 times and the piece travels 102 steps in total, counting both forward and backward steps. The number of 2s equals the number of 4s, and the number of 1s is twice the number of 3s. How many forward steps are taken altogether?