The count, section by section
Reading and Writing is 54 questions, split into two modules of 27. Math is 44 questions, split into two modules of 22. That is 98 questions in 2 hours and 14 minutes of testing.
Every Reading and Writing question is attached to its own short passage, so 54 questions means 54 separate passages. There is no shared passage set the way there was on the old paper test.
Solve for x: x² = 36
Which questions are scored
Each of the four modules contains 2 pretest questions that do not count. That is 8 unscored questions in total, leaving 90 scored questions: 50 in Reading and Writing and 40 in Math.
Pretest questions are not marked in any way. College Board mixes them in so it can gather difficulty data on new items under real testing conditions. Because you cannot identify them, there is no strategy here. Answer everything as if it counts.
Math is roughly 75 percent multiple choice with four options, and roughly 25 percent student produced response, where you type your answer into a box.
Question types inside Math
Math is roughly 75 percent multiple choice with four options, and roughly 25 percent student produced response, where you type your answer into a box. On a 44 question section that is about 33 multiple choice and about 11 grid ins. Treat those as approximate counts, since the exact split can shift slightly between forms.
Grid ins accept integers, decimals, and fractions. Negative answers are allowed on the digital SAT. There is no penalty for a wrong grid in, so leaving one blank is strictly worse than typing something.
How the questions are distributed by topic
Math is weighted about 35 percent Algebra, about 35 percent Advanced Math, about 15 percent Problem Solving and Data Analysis, and about 15 percent Geometry and Trigonometry. On 44 questions that is roughly 15, 15, 7, and 7.
Reading and Writing is weighted about 28 percent Craft and Structure, about 26 percent Information and Ideas, about 26 percent Standard English Conventions, and about 20 percent Expression of Ideas. On 54 questions that is roughly 15, 14, 14, and 11.
These are published domain weights, so the percentages are firm. The per question counts derived from them are rounded estimates.