Deductive Reasoning Puzzles With Answers | Best Riddles and Brain Teasers

#141 - Classic Philosophical Betrayed Riddle

John and Sophie were so frustrated with their life that they decided to end the misery by ending their life. They decided that both will jump off the building on the count of three. They started counting and on the count of three, John jumped white Sophie did not. She watched John fall off for around seven seconds when the parachute opens.

Who betrayed whom?

View Answer Discuss

John betrayed Sophie.
Sophie may not jump because of the survival instinct and therefore can be given a benefit of the doubt, whereas John having the parachute seem a well-thought plan.

#142 - Maze Riddle

You need to complete the maze by entering from the entrance (near yellow circle - bottom left) and they leave from the exit point (near green circle - bottom middle).You need to follow below rules: 1. You can go through one circle more than once. 2. You can move only by exchanging green and yellow circles.

View Answer Discuss

It can be solved as below

#143 - Real Name Puzzle

My friends called me Iron59 because my parents are a chemist and a mathematician.What is my real name?

View Answer Discuss

Felix
Iron = Fe (chemical symbol)
59 = LIX (Roman numerals)

#144 - Missing Ball Sequence Puzzle

Can you find the value of "?" in the ball picture puzzle below.

View Answer Discuss

3

Digits are represented in binary form where a ball is 1 and a ring is 0.
001 = 1
010 = 2
100 = 4
011 = 3

#145 - Awesome What Am It Riddle

I got a bee but no honey.
I got an eye but still blind.
got a sea but no water.
I got a tea but no coffee.
I got a tea but no answer.

What Am I?

View Answer Discuss

The alphabets.

Eye = I
Sea = C
Bee = B
Tea = T
Why = Y

#146 - Newton Birthday Riddle

Today is Newton birthday.
A year ago, Newton had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is Newton Today?

Of course, he is not five today.

View Answer Discuss

31

Newton was lighting the candles in binary i.e
11110 =>30
11111 =>31

#147 - AntiSocial Owl Riddle

Which of the below owl is an antisocial owl?

View Answer Discuss

The marked owl is looking away from the rest.

#148 - Hidden Animals Picture Puzzle

Can you find the six hidden animals in the picture below?

View Answer Discuss

Six hidden animals are Rabbit, Alligator, Camel, Butterfly, Cobra, and Deer.

#149 - Fun With Equation Puzzle

Let us say there are two natural numbers "L" and "R".
We performed eight operations on these two numbers as

Step-1: L = R
Step-2: L x L = R x L
Step-3: L^2 - R^2 = LR - R^2
Step-4: (L + R)( L - R) = R(L - R)
Step-5: L + R = R
Step-6: R + R = R
Step-7: 2R = R
Step- 8: 2 = 1

What is wrong here?

View Answer Discuss

Step5 is Wrong.
We divided the two sides by (L-R).Since L = R which indicates that (L - R) = 0 and we cannot divide by zero.

#150 - Tricky Algebraic Equation

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

View Answer Discuss

XI - I = X

Remove I (Roman equivalent of number 1) from the LHS, you will the get the number on the RHS.
29 - 1 = 30
XXIX - I = XXX

14 - 1 = 15
XIV - I = XV

9 - 1 =10
IX - I = X

Similarly,
11 - 1 = 10
XI - I = X