Question 13
Evaluate $\frac{1\cdot2\cdot3+2\cdot4\cdot6+4\cdot8\cdot12+7\cdot14\cdot21}{1\cdot3\cdot5+2\cdot6\cdot10+4\cdot12\cdot20+7\cdot21\cdot25}$.
Original printed choices: A) $\frac15$; B) $\frac25$; C) $\frac35$; D) $\frac45$; E) $\frac65$
Editorial task: Evaluate the expression as printed, then explain the discrepancy with the source’s intended factorization.
Original printed choices: A) $\frac15$; B) $\frac25$; C) $\frac35$; D) $\frac45$; E) $\frac65$
Editorial task: Evaluate the expression as printed, then explain the discrepancy with the source’s intended factorization.