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1.图中“祝小朋友们六一快乐”九个汉字代表15至23中的哪个数时,才能使每个正方形内4个数的和都等于61.
1. In the chart, “Wish Children Happy Day 61,” which of the numbers 15 to 23 the nine Chinese characters represent, can make the sum of the four numbers in each square equal to 61.