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euler1
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| ;; e1 | |
| (define (mod-three-or-five? x) | |
| (if (or | |
| (= (modulo x 3) 0) | |
| (= (modulo x 5) 0)) #t #f)) | |
| (define (e1 x) | |
| (sum | |
| (filter | |
| mod-three-or-five? | |
| (iota x)))) |
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