| 1 | All of the chimps had already learned the ascending order of Arabic numerals, from 1 to 9. | |
| 2 | The four warmest years were, in ascending order, 2002, 2003, 2005 and 1998. | |
| 3 | The volunteers then had to recall which numeral appeared in which place and touch the squares in ascending order, from lowest to highest. |
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