SAT Calculator Strategies • Lesson 4 of 4
Smart Guessing
There is no penalty for a wrong answer — so never leave anything blank.
The SAT does not subtract for wrong answers, so a blank is strictly worse than a guess. When you are stuck or out of time, guess smartly: remove every choice you can prove impossible, then pick from what is left. Even removing one option lifts your odds.
What makes a choice killable
- Wrong sign — the answer must be positive but the choice is negative.Eliminate it.
- Wrong size — a part bigger than the whole, or a discount above the original price.Eliminate it.
- Breaks a stated condition — “x is an integer” but the choice is 2.5.Eliminate it.
💡
On grid-ins there are no choices to eliminate — so always enter your best computed value. A blank grid-in scores zero for certain; an attempt might be right.
Formula Reference Sheet
This chapter
Golden rules
| Speed | use the tool for messy work, not one-step math |
|---|---|
| Trust | estimate to sanity-check every answer |
| Never blank | eliminate, then guess — no penalty |
Digital SAT reference
Area & Circumference
| Circle area | A = πr² |
|---|---|
| Circle circumference | C = 2πr |
| Rectangle | A = ℓw |
| Triangle | A = ½ b h |
Volume
| Rectangular box | V = ℓwh |
|---|---|
| Cylinder | V = πr²h |
| Sphere | V = 4⁄3 πr³ |
| Cone | V = 1⁄3 πr²h |
| Pyramid | V = 1⁄3 ℓwh |
Right triangles
| Pythagorean theorem | a² + b² = c² |
|---|---|
| 30°–60°–90° | sides x : x√3 : 2x |
| 45°–45°–90° | sides s : s : s√2 |
Constants
| Degrees in a circle | 360° |
|---|---|
| Radians in a circle | 2π |
| Angles of a triangle | sum = 180° |
🖩 Graphing Calculator