Problem Solving (PS) | Re: a, b, c, d are positive integers. When a is divided by b, the

Recall that the remainder must be less than the divisor; thus, b must be greater than 7 since “when a is divided by b, the remainder is 7.” Similarly, d must be greater than 5 since “when c is divided by d, the remainder is 5.” Since b and d are positive integers, b ≥
...

---