#151 - 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 ?

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

#152 - Logical Bet Riddle

Snow and Tyrion are two mad logicians and loves betting.They placed 11 Candies at the table and designed a small betting game, in which both of them need to eat Candies turn by turn with the following rules:Rule1: One need to eat at least one candy.Rule2: One cannot eat more than 5 candies.The one that eats last candy will loose.Snow won the toss and need to start.How many candies must Snow ear in order to make sure that he won the bet?

Logical Bet Riddle

Snow eats 4 candies

How many candies Tyrion eats, Snow needs to make sure that only 1 candy is left after his turn, So Tyrion needs to eat the last candy.

Example:
If Tyrion picks 1, Snow picks 5
If Tyrion picks 2, Snow picks 4
....
...
If Tyrion picks 5, Snow picks 1

#153 - James Bond Decipher Code Riddle

James Bond needs to access a secret file locked in a locker that can be accessed only by a code. The code is about 7 characters and consists of numbers and letters. There was a label on the locker as "You force heaven to be empty".What was the code?>

James Bond Decipher Code Riddle

U472BMT
The code can be decoded to sound as "U four seven two B M T"

#154 - 16 Nodes Connectivity Riddle

Sixteen nodes are shown below and you need to connect them based on the following rule: Every node can be connected to the number of nodes inside them, i.e. the first node there is a value of 1 which indicates that the first node can connect to exactly one node only.Can you do it?

16 Nodes Connectivity Riddle

It can be done as illustrated below.

#155 - 3 Cup Classic Lateral Thinking Puzzle

Below picture shows three empty cups. You need to put in your lateral thinking cap and place ten sugar cubes in three cups such that every cup contains an odd number of sugar cubes.
Can you do it?

3 Cup Classic Lateral Thinking Puzzle

Pour three sugar cubes on cup1 and cup3 and 4 sugar cubes on cup-2
Now,
Cup-1 got three sugar cubes.
Cup-3 got three sugar cubes.
Cup-2 got three seven cubes (3 of cup-1 and 4 of its own)

#156 - IQ Picture Riddle

By adding three letters, can you move image from

to
IQ Picture Riddle

Image
http://www.briddles.com/images/riddles/IQ-TEST-BRIDDLES-.png
can be changed to
http://www.briddles.com/images/riddles/IQ-TEST-BRIDDLES-ANS.png
By adding 3 letters "Ans".

#157 - Isolate 9 Dogs Square Fence

Can you add 2 squares in the picture below such that each dog is in isolation?

Isolate 9 Dogs Square Fence

Add two squares as shown in the picture below.

#158 - Fill Boxes 1-9 Puzzle

Fill the boxes using numbers 1-9 exactly once to solve the below puzzle.

Only 1% of users can solve this puzzle in 10 minutes. Can you?

Fill Boxes 1-9 Puzzle

1 7
X 4
---
6 8
2 5
---
9 3

For a better explanation, please watch the video.

#159 - Coronavirus Escape From Hospital Brain Teaser

A hospital is infected with 16 patients. The patient number 13 is recovered from coronavirus and want to say goodbye to all the remaining patient by visiting every patient exactly once.
However, If the recovered patient enters any room twice, he will get infected again.

What path he must take to escape from room-13 to room-4?

Coronavirus Escape From Hospital Brain Teaser

The Patient will follow the path from room number-13 to room-no.4 as shown in the picture below.

#160 - Next number in matchstick Brain Teaser

Can you identify the next number in this viral matchsticks Puzzle?

Next number in matchstick Brain Teaser

1

Explanation.
At every step number of joints goes down by 1.
i.e
8 have 6 joints
9 have 5 joints
5 have 4 joints
3 have 3 joints
7 have 2 joints
1 has 1 joint

You can also watch the video for an explanation.