# Math Challenge: Solve in 40 Seconds

> A math puzzle traps you in 40 seconds with hidden parentheses.
- Title: Math Challenge: Solve in 40 Seconds · Psychologies | Shortify
- Summary: A math puzzle traps you in 40 seconds with hidden parentheses. Solving 130 - (50 - (9 × 3 - 6)) requires careful attention to parentheses, not speed.
- Keywords: math, parentheses, calculation, attention, psychologies, mental challenge, 40 seconds, Challenge, Solve, Seconds
- Source: Psychologies — https://psychologies.com/culture/savoirs/Le-defi-du-jour-Pouvez-vous-resoudre-ce-calcul-en-40-secondes-sans-tomber-dans-le-piege-640549
- Author: La Rédaction
- Published: 2026-09-25T09:14:00+00:00
- Read time: 1 min
- Topics: math, parentheses, calculation, attention, psychologies, mental challenge, 40 seconds
## Daily Challenge
Solve this math puzzle in 40 seconds without falling into a trap.

> 130 - (50 - (9 × 3 - 6))
## The Trap
Parentheses make this calculation tricky for many readers.
## Why It's Hard
Your brain simplifies expressions too quickly, causing errors.
## The Solution
Start with the innermost parentheses to avoid mistakes.

> 130 - (50 - (27 - 6))
## Correct Answer
The final result is 107 after careful calculation.

> 107
## Test Yourself
Share the puzzle with others to see who falls into the trap.
## Key takeaway

Solving 130 - (50 - (9 × 3 - 6)) requires careful attention to parentheses, not speed.