Logical reasoning puzzles are very effective in building your logic and common sense. Not only these help in studies and problem solving, but also help you in general day to day life to make logical decisions and conclusions. That’s why we have listed these 5 interesting logical reasoning puzzles to help you become more smarter and clever.
1. Guess the value – The number puzzle
As it can be seen from the above picture, it is given that 3 = 8, 4 = 19, 5 = 32, 6 = 47, 7 = 66. Then you have to find the value of 8. This is a classic example of a logical puzzle where you need to think deeper to solve this. Try yourself before seeing the answer.
Answer : Normally, one would start by looking for a pattern in the given sequence. The sequence starts with 3 being equal to 8 and 4 is equal to 19. Thus a difference of 19 – 8 = 11 when we move from 3 to 4. Similarly, difference of 32 – 19 = 13 when we move from 4 to 5, a difference of 47 – 32 = 15 when we move from 5 to 6.
You may start to think that the pattern is : “the difference increases by 2 on every step ahead” but as soon as you get to 7 from 6 the difference becomes 66 – 47 = 19. Hence it doesn’t follow the pattern. So how can we solve it? Do you see any other pattern?
Instead if you just try to read the problem again, you will get the answer very easily. The first statement itself says that 3 = 8, that simply means 8 = 3 also. Wasn’t it pretty simple? Let’s go to the next puzzle.
2. The Unknown Light Source – Logical mystery
A person is walking alone on a road. In that area there is no streetlight. The person himself is not carrying any torch or lamp. Also there is no moonlight. While walking, all of a sudden a huge hole dug in the middle of the road comes in front of the man. But still he is able to see that hole and avoids it without falling into it. How?
Answer : Are you still wondering how is it possible? How can he see the hole even without any light source? To tell you the truth, this problem should not be even classified as a problem because there is nothing wrong with it. Even though many things are mentioned like there is no streetlight and he doesn’t have any light source but “who told you that it is the night time?” It is the daytime so he can see everything clearly. I think you got what this problem was trying to test within you. Let’s move on to the next puzzle.
3. Fill in the blank – NOT so common equation
You are told to fill the blank for the following equation to make it right :
1 + 2 + 3 + 4 + 5 + __ = 21
Simple isn’t it? But wait, only condition is that you can’t fill 6. What? You think the question is wrong? Nah!! Give it a try then you can check the answer.
Answer : Still wondering what is the answer? After a simple calculation you must also have realized that the blank must be equal to 21 – (1 + 2 + 3 +4 +5) and that is equal to 6. So no way anything except 6 can be filled in the blank.
But as the question demands 6 must not be filled. But still there is no issue. Even though we can’t fill 6 but we can fill something the evaluates to 6. So the answer can be 3! (read 3 factorial). Yes 3! can be filled in the blank which is also equal to 6. This problem was designed to force your mind to think deeply and craft the answer in the format as required by the problem. If these aren’t enough, let’s check the remaining two logical reasoning puzzles to help you train your brain more.
4. Find the value of question mark – Diagram puzzle< style="text-align: justify;"p>The above diagram has 3 triangles and numbers present on their corners. By observing the numbers present in with the three triangles, you have to find what number will come at the place of ? in the 4th triangle.
Answer : To solve this, you must find the pattern among the numbers on corner of triangle that is resulting in the number inside it. By observing all the triangles, we see that :
The number in the middle of the triangle = (Product of numbers on top and left corner of the triangle) - (The number at the right corner)
For example :
- In first triangle, 9 = (7 x 2) – 5
- In second triangle, 8 = (2 x 5) – 2 and
- In third case, 1 = (3 x 1) – 2
Hence if we follow the same pattern, we get :
? = (3 x 4) - 7 = 5
Thus 5 is the answer.
5. Presence of Mind
A candidate appears in an interview. The interview goes very well and at the end the interviewer tells the candidate that : “This is your last question ,if you can answer it correctly then we will hire you“.
He asks the candidate : Can you place your finger at the center of the table?
The candidate immediately puts his finger at the center. The interviewer asks him : Are you sure that your finger is point at the exact center of the table? The candidate gives him a reply and the next second the interviewer hires him for the job.
Can you tell what what was the candidate’s reply?
Answer : If you go through their conversation one more time, at the beginning itself it is stated that the interviewer had told him this is your last question. So after asking the candidate to place his finger at the center of the table, he again asked him another question about whether it is the exact center. The candidate quickly replied that : Sir you already told me that was my last question, but still you are asking another question. This reply impressed the interviewer and he hired him because of his excellent presence of mind.
How many of the above logical reasoning puzzles were you able to solve correctly? Do tell us in the comment box and share it with others.
ALSO TRY : The 8 coin and a weighing scale puzzle