Keeping up with our GMAT duties we have the new GMAT Official Guide 2020. No surprise, it's very similar to the OG2019, OG2018 and so on. Just looking around the online question bank, which is helpful, I noticed that you have a calculator on offer for all of the sections. Of course, you can you use a calculator on the integrated reason but besides that you cannot use a calculator on the GMAT. So, even though Wiley, GMAC, Efficient Learning, or whomever weren't able to toggle the calculator off for the problem solving and data sufficiency please do yourself a favor and don't use it.