Question

FORWARD,5; BACKWARD,4. Which of the following statements about the above instructions is true?

• A. $n_2=n_1+4$ provided $1<n_1<7$
• B. $n_2=n_1$ provided $M<6$
• C. $n_2=n_1+1$ provided $M-n_1\ge 5$
• D. $n_2-n_1<0$ provided $M>0$

Answer 1

The correct option is C $n_2=n_1+1$ provided $M-n_1\ge 5$

FORWARD, 5; BACKWARD, 4, would effectively mean a FORWARD 1 i.e. $n_2-n_1=1$ (if $M-n_1\ge 5$) . The option that satisfies this condition is (c).