All problems in Chapter 4

Problem 4.8 · Quadratic Equations

Digits that reverse (product 6)

Where would you look first?

  1. find
  2. lens
  3. answer
  4. probe

A two-digit number is such that the product of the digits is 6. When 9 is added to the number, the digits interchange places. Find the number.

Source: Practice

Tap the part of the question you would look at first.