Tricky IQ Riddle: Can You Find the 5th Son’s Name in 5 Seconds? It's Not Fifty!

Mar 18, 2025, 16:45 IST

This brain teaser challenges readers to identify the name of the fifth son in a tricky riddle: "Larry's father has five sons: Ten, Twenty, Thirty, Forty... What is the name of the fifth son? (Hint: It's NOT Fifty.)" The puzzle tests logical reasoning, observation skills, and IQ. Many people mistakenly assume the answer follows a numerical pattern, but the key lies in the wording of the question itself. Only those with sharp analytical thinking can spot the hidden clue. Readers are encouraged to take the challenge, think critically, and test their problem-solving abilities in just 5 seconds.

Tricky IQ Riddles: Spot the 5th Son’s Name—It's Not Fifty!
Tricky IQ Riddles: Spot the 5th Son’s Name—It's Not Fifty!

IQ riddles and brain teasers are not just entertaining—they are a test of intelligence, logical reasoning, and quick thinking. Studies in cognitive psychology show that engaging in puzzles like this enhances brain function, improves problem-solving skills, and even strengthens memory. When you challenge your mind with tricky riddles, you activate multiple brain regions, particularly the prefrontal cortex, responsible for decision-making and analytical reasoning.

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High-IQ individuals often excel at brain teasers because they have an innate ability to process patterns, break down problems, and think critically. This challenge is designed to test your ability to see beyond the obvious and recognize hidden clues within the question itself. If you consider yourself quick-witted and sharp-minded, here’s your chance to prove it!

Can You Solve This Riddle in 5 Seconds?

brain teasers with answers

Here’s the puzzle that has left many scratching their heads:

Larry's father has five sons: Ten, Twenty, Thirty, Forty... What is the name of the fifth son? (Hint: It's NOT Fifty.)

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At first glance, your brain might instinctively follow the numerical sequence—Ten, Twenty, Thirty, Forty... leading you to think of Fifty.

But hold on! This puzzle isn’t just about numbers. There’s something tricky hidden in the wording. Can you figure it out?

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Take a closer look at the sentence. Read it again, carefully. The answer is right in front of you, but only those with keen observation skills and logical thinking can spot it.

If you cracked this brain teaser riddle in 5 seconds, you have exceptional critical thinking skills and a strong ability to think beyond the obvious.

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Brain Teaser Riddles With Answers 

Still puzzled? If you need a hint—think about the very first words of the sentence. The name of the 5th son is Larry.

brain teasers with answers

Think you’ve cracked the puzzle? Challenge your friends and family to see if they can solve it too! Share this brain teaser and put their IQ and logical reasoning to the test. Let’s see who can spot the right answer the fastest!

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Roopashree Sharma
Roopashree Sharma

Deputy Manager

Roopashree Sharma is a seasoned content writing professional with over 5 years of experience in digital journalism, specializing in education, science, trending, national and international news. She holds a degree in Journalism and Mass Communication and has contributed to leading media houses including Zee, Times, and India TV. Currently serving as Assistant Manager – Editorial at Jagran New Media, she writes and manages content for the General Knowledge (GK) section of the Jagran Josh (English) portal. For inquiries, contact her at roopashree.sharma@jagrannewmedia.com.

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