Errata – Foundations of GMAT Math, 5th Edition
Cover for 5th Edition
Release Date:
November 15, 2011
5.0
| Page | Loc | Description | Erroneous Text | Correction |
|---|---|---|---|---|
| 90 | Mid | Question #38, it should say “each” instead of “both”: “Positive integers a and b each have exactly four factors.” | Positive integers a and b both have exactly four factors. | Positive integers a and b each have exactly four factors. |
| 93 | E-BOOK ONLY | Near page 50. Drill 3, Question 13 solution. The factors box of x incorrectly lists 4 and 5 as factors when those should be 3 and 6 respectively. | Factor pairs 1 & 42, 2 & 21, 4 & 14, 5 & 7 | Factor pairs 1 & 42, 2 & 21, 3 & 14, 6 & 7 |
| 97 | Top | The answer to number 31 mistakenly says that 87 is a factor of 85. | The number is 85 and the factors are 1, 5, 17, and 87. | The number is 85 and the factors are 1, 5, 17, and 85. |
| 238 | Bot | The answer to number 22 is 1.234, not 1,234. | 1,234: | 1.234 |
| 249 | Mid | In the step-by-step instructions, the text incorrectly says to divide by 100 when the work is simplified by multiplying by 100. | Divide both sides by 100 | Multiply both sides by 100 |
| 249 | Bot | The answer to question #65 is not 144, but 144% | 144 | 144% |
| 250 | Top | The solution to question #65 is missing the final statement that x is 144 percent of m | The resulting number is 144% of m. | |
| 265 | Top | The answers to Check Your Skills #1 and #2 can be found on page 281, NOT 283. | ||
| 271 | Mid | The answer to Check Your Skills #6 can be found on page 282, NOT 284. | ||
| 351 | Bot | The answer to #11 is y > 4. | y < 4 | y > 4 |
| 355 | Bot | The explanation for #40 contains an error on the third line, right-hand side. It should say -x/4 = 3.5, NOT -x/4 = -3.5. | -x/4 = -3.5 | -x/4 = 3.5 |
| 364 | Mid | On the number line for #48, 4 and -4 should be open circles. | ||
| 365 | Top | The explanation for #51 contains a mistake in the left-hand equation. The product of 15 and (-4x)/5 is -12x, NOT 12x. |
12x + 10 <= 7
12x <= -3 x >= 1/4 |
-12x + 10 <= 7
-12x <= -3 x >= 1/4 |
| 365 | Mid | The solution for question #53 does not restate the value that x must be less than or equal to. | x ≤ | x ≤ -19/5 |
| 386 | Bot | In the formula towards the bottom of the page, the right side of the equation mistakenly says miles instead of kilometers. | 4 kilometers/hour * Time (hours) = 12 miles | 4 kilometers/hour * Time (hours) = 12 kilometers |
| 408 | Bot | The last equation in the explanation for #31 contains an error. The product should be 16 * 9, NOT 12 * 9. | 64 * 2.25 = 64 * 9/4 = 12 * 9 = 144 | 64 * 2.25 = 64 * 9/4 = 16 * 9 = 144 |
| 415 | Top | The last line of the explanation for question #44 says 40% instead of 36%. | Therefore 40% of the students got a C. | Therefore 36% of the students got a C. |
| 484 | Top | Question #45 should state that Triangle ABC is a right triangle. | Triangle ABC and Rectangle JKLM have equal areas. | Right Triangle ABC and Rectangle JKLM have equal areas. |
| 488 | Mid | The explanation to #11 incorrectly states that 9/360 = 1/4. | then the sector is 1/4 of the circle, because 9/360 * 1/4 | then the sector is 1/4 of the circle, because 90/360 = 1/4 |