| 1 | (B) | 2 | (A) | 3 | (A) | 4 | (D) | 5 | (A) |
| 6 | (A) | 7 | (A) | 8 | (B) | 9 | (D) | 10 | (C) |
| 11 | (A) | 12 | (D) | 13 | (A) | 14 | (C) | 15 | (C) |
| 16 | (B) | 17 | (A) | 18 | (D) | 19 | (B) | 20 | (C) |
| 21 | (C) | 22 | (C) | 23 | (D) | 24 | (A) | 25 | (A) |
| 26 | (C) | 27 | (B) | 28 | (A) | 29 | (C) | 30 | (C) |
| 31 | (D) | 32 | (B) | 33 | (A) | 34 | (B) | 35 | (A) |
| 36 | (A) | 37 | (D) | 38 | (C) | 39 | (A) | 40 | (D) |
| 41 | (B) | 42 | (D) | 43 | (D) | 44 | (B) | 45 | (A) |
| 46 | (B) | 47 | (A) | 48 | (A) | 49 | (C) | 50 | (A) |
| 1 | B | 2 | B | 3 | C | 4 | C | 5 | C |
| 6 | B | 7 | B | 8 | C | 9 | B | 10 | B |
| 11 | C | 12 | B | 13 | B | 14 | D | 15 | A |
| 16 | D | 17 | A | 18 | D | 19 | B | 20 | D |
| 21 | B | 22 | D | 23 | C | 24 | D | 25 | A |
| 26 | C | 27 | C | 28 | B | 29 | A | 30 | D |
| 31 | A | 32 | D | 33 | C | 34 | A | 35 | B |
| 36 | C | 37 | A | 38 | A | 39 | C | 40 | C |
| 41 | A | 42 | C | 43 | D | 44 | D | 45 | D |
| 46 | A | 47 | D | 48 | D | 49 | B | 50 | D |
| 1 | D | 2 | B | 3 | B | 4 | C | 5 | B |
| 6 | C | 7 | C | 8 | C | 9 | C | 10 | C |
| 11 | D | 12 | C | 13 | A | 14 | A | 15 | A |
| 16 | C | 17 | D | 18 | B | 19 | D | 20 | A |
| 21 | A | 22 | D | 23 | C | 24 | A | 25 | C |
| 26 | B | 27 | B | 28 | B | 29 | A | 30 | B |
| 31 | A | 32 | B | 33 | A | 34 | C | 35 | A |
| 36 | D | 37 | C | 38 | A | 39 | A | 40 | D |
| 41 | D | 42 | C | 43 | A | 44 | C | 45 | C |
| 46 | C | 47 | C | 48 | B | 49 | B | 50 | C |
CREST Science Olympiad (CSO) Answer Keys for the Academic Year 2023-24.