| Question | Answer | % Correct |
|---|---|---|
| 61 + 19 | 80 | 95%
|
| 64 + 95 | 159 | 90%
|
| 84 + 88 | 172 | 90%
|
| 33 + 109 | 142 | 87%
|
| 154 - 33 | 121 | 73%
|
| 254 + 65 | 319 | 73%
|
| 97 - 28 | 69 | 66%
|
| 66 - 19 | 47 | 60%
|
| 312 - 213 | 99 | 40%
|
| 614 + 312 | 926 | 29%
|
| 519 - 27 | 492 | 23%
|
| 109 + 489 | 598 | 16%
|
| 654 - 156 | 498 | 9%
|
| 975 - 276 | 699 | 7%
|
| 819 - 137 | 682 | 6%
|