Enigma 1378: Exaudi Deus
29 October 2013
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From New Scientist #2538, 11th February 2006
In our church we use a hymnbook with fewer than a thousand hymns. On Sunday we sing an opening hymn, a psalm, and three more hymns, the numbers being displayed in that order on the board.
Recently, as I sat at the organ I noticed that the five numbers were all different perfect squares in increasing order, and that each digit which did occur, occurred exactly three times.
What was the number of the psalm?