In many GMAT work rate problems, the amount of work done is 1 job, so you can set the amount of work equal to 1 for a single job. There are also other work rate questions that may specify a different amount of work (for example, producing 800 nails), but, if the same amount of work is used in different scenarios, you may be able to answer the question more efficiently if you just call that amount of work 1 job. Please contact me if you would like me to create a video explaining how to use this GMAT Timing Tip.

Here are lists of questions that you can use to practice setting the amount of work equal to 1 for a single job, so that you can answer questions more efficiently and increase your GMAT score:

### Official Guide GMAT practice questions

**GMAT Official Guide 2019**: 118, 133, 251**GMAT Official Guide 2018**: 113, 132**GMAT Official Guide 2017**: 96, 114

### List of questions on this topic posted on Yin Tutoring:

- Working simultaneously at their respective constant rates, Machines A and B…-
- Source: OG2019 #133, OG2018 #132, OG2017 #114
- Difficulty: 600-700 Level

- Machine R and machine S work at their respective constant rates-
- Source: OG2019 #251
- Difficulty: Sub-600 Level

- Three printing presses, R, S, and T, working together at their…-
- Source: OG2019 #118, OG2019 #113, OG2017 #96
- Difficulty: Sub-600 Level