diff --git a/LearnEnglish/LearnEnglish/Models/Quiz.swift b/LearnEnglish/LearnEnglish/Models/Quiz.swift
index bd8cf6a..a28fc24 100644
--- a/LearnEnglish/LearnEnglish/Models/Quiz.swift
+++ b/LearnEnglish/LearnEnglish/Models/Quiz.swift
@@ -71,7 +71,8 @@ enum QuizGenerator {
         let chars = Array(word)
         let letterPositions = chars.indices.filter { chars[$0].isLetter }
         guard !letterPositions.isEmpty else { return word }
-        let blankCount = min(letterPositions.count - 1, Int(ceil(Double(letterPositions.count) * 0.4)))
+        let maxBlanks = letterPositions.count - 1
+        let blankCount = maxBlanks > 0 ? Int.random(in: 1...maxBlanks) : 0
         let indices = Set(letterPositions.shuffled().prefix(blankCount))
         return chars.enumerated().map { indices.contains($0.offset) ? "_" : String($0.element) }.joined()
     }