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### Across

**1** Triangular one then square. **(3)** — 136 is a triangular number that is a one followed by a square number (36).

**3** Audible German no between tutus, for one square. **(5)** — 29241 is a square number that sounds like a German no (nein/nine) between tutus (two two) for one (four one).

**5** Irreducible ending Morpheus halloumi fix, then Trinity, then mixed up Neo. **(3)** — 631 is an irreducible number that is the ending of Morpheu**s** halloum**i** fi**x** (six), the trinity (three), then mixed up Neo (oNe).

### Down

**1** Inside Fort Worth following unlucky multiple of eleven. **(3)** — 132 is a multiple of 11 that is inside For**t Wo**rth (two) following unlucky (13).

**2** Palindrome two between two clickety-clicks. **(5)** — 66266 is a palindrome that is a two between two clickety-clicks (66s).

**4** Confused Etna honored thundery din became prime. **(3)** — 131 is a prime that is an anagram of "Etna honored thundery din" (onE hundred and thirty one).