Multiple choice general knowledge math & puzzles

2 + 8 + 5 = 161035, 3 + 9 + 4 = 271256, 4 + 8 + 3 = 321639, 5 + 9 + 4 = ?

  1. 408020

  2. 452044

  3. 452040

  4. 452048
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pattern: $(a \times b)$, $(a \times c)$, then $a \times (b+c)$. For $5+9+4$: $5 \times 9 = 45$, $5 \times 4 = 20$, and $5 \times (9-1)=40$ or similar concatenation. The result 452040 follows the $(a \times b)(a \times c)(a \times [b+c-1])$ logic.

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