No. XXXIX

The sentence formed with the ten letters above the line, which is the key to this sum, is—Add these up. If these letters are numbered consecutively 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, and the corresponding figures are substituted for the numbers, the sum works out as is shown below.

DU 29
EH65
ED83
AP10
ST74
DEA261

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