Ciphers
Pattern Recognition
Logic Puzzles
Deduction
100
Uryyb Jbeyq
(Hint: Rot13 or Rail Fence)
Answer: Hello World
100
What comes next? 3, 10, 21, 36, 55,....?
Answer: 78
Reasoning: +7, +11, +15, +19, +23
100
I’m a word of 5 letters. Remove my first letter, I’m still the same. Remove my last letter, I’m still same.
What word am I?
Answer: EMPTY
First scenario: MPTY
Second scenario: EMPT
100
You are a prisoner in a room with 2 doors and 2 guards. One door leads to freedom, the other to death. One guard tells the truth and the other always lies. You have to choose and open one of these doors, but you can only ask a single question to one of the guards.
What do you ask to find the door leading to freedom?
Answer: Teams can give any valid response as long as they are ABLE to JUSTIFY it
200
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Answer: Congrats
200
Complete the sequence:
1A, 4D, 9I, 16P, ?
Answer: 25Y
Rule: Numbers = squares, Letters = alphabetic position × pattern explain this
200
You are outside a closed room with three light switches. Only one of them controls a light inside the room. You can flip the switches as much as you want, but you can only enter the room once to check. How do you know which switch controls the light?
Answer: Turn on two switches, then turn one off after a few minutes. Enter the room; if the bulb is on, it’s the first switch. If the bulb is warm, it’s the second. If cold, it’s the third.
200
You have two ropes that each take an hour to burn; however, they burn at inconsistent rates. How can you measure 45 minutes? (Hint: You can light one or both ropes at one or both ends at the same time.)
Answer: Light the first rope at both ends and light the other rope at one end, all at the same time. The first rope will take 30 minutes to burn (even if one side burns faster than the other, it still takes 30 minutes). The moment the first rope goes out, light the other end of the second rope. Because the time elapsed of the second rope burning was 30 minutes, the remaining rope will also take 30 minutes; lighting it from both ends will cut that in half to 15 minutes, giving you 45 minutes altogether.
300
01010111 01001001 01001110 01001110 01000101 01010010
Answer: Winner
Reward: In the case that another team gets a question wrong, you will be awarded 30 sec to have a chance to solve it and claim extra points
300
What comes next? O T T F F S S E ?
Answer: Initial letters of numbers: One, Two, Three, Four, Five, Six, Seven, Eight → Nine…N
300
You need to get a fox, a chicken, and a bag of grain across a river in a boat. The boat can only hold you plus one item. If you leave the fox and chicken alone, the fox eats the chicken. If you leave the chicken and grain alone, the chicken eats the grain. How do you do it?
Answer: 1. Take chicken → cross 2. Return alone 3. Take fox → cross 4. Bring chicken back 5. Take grain → cross 6. Return alone 7. Take chicken → cross
300
You arrive at a door guarded by three people: Alex, Blair, and Casey.
Each guard is either a Knight (always tells the truth) or a Knave (always lies).
Exactly one of them knows the secret code to open the door.
Alex says:
“Casey does not know the code.”
Blair says:
“Alex is a Knave.”
Casey says:
“I know the code, but only if Alex is a Knight.”
Answer: Alex( Knight ), Blair ( Knight ), Casey (Knave and has the code)
400
R TFVHH BLFIV OFXPB
(Hint: Caesar or Atbash or Hill Cipher)
Answer: I Guess Youre Lucky
400
How many triangles are there?
Answer: 29 but allow +-1
400
You have 10 coins in a line. You are blindfolded. You know 5 coins are heads and 5 tails. How can you split them into two piles with the same number of heads, without knowing which coins are heads?
Answer: Take any 5 coins, flip all of them → now both piles have same number of heads.
400
Five boxes in a row. One contains gold.
Box 1: “Gold is not here.”
Box 2: “Gold is to the left of me.”
Box 3: “Gold is not next to me.”
Box 4: “Gold is in Box 5.”
Box 5: “Gold is not in Box 2.”
Exactly two statements are true. Which box has the gold?
Answer: Box 4
500
- .... . / -.-. .- - / .--- ..- -- .--. . -.. / --- ...- . .-. / - .... . / -- --- --- -.
Answer: The cat jumped over the moon
500
Complete the sequence:
1, 2, 6, 21, 88, ?
Answer: 445
1 × 1 + 1 = 2
2 × 2 + 2 = 6
6 × 3 + 3 = 21
21 × 4 + 4 = 88
88 × 5 + 5 = 445
500
You have five boxes in a row numbered 1 to 5, in which a cat is hiding. Every night, he jumps to an adjacent box, and every morning, you have one chance to open a box to find him. How do you win this game of hide and seek?
Answer: Check boxes 2, 3 and 4 in order until you find him.
500
Suppose you have a 4-litre jug and a 9-litre bucket. How can you measure exactly 6 litres using only these two containers and an unlimited supply of water?
Answer:
Step 1: Fill the 9-litre bucket completely.
Step 2: Pour water from the 9-litre bucket into the 4-litre jug until it is full.
Step 3: Empty the 4-litre jug.
Step 4: Pour water from the 9-litre bucket into the 4-litre jug again until it is full.
Step 5: Empty the 4-liter jug.
Step 6: Pour the remaining 1 liter from the 9-liter bucket into the 4-liter jug.
Step 7: Refill the 9-liter bucket completely.
Step 8: Pour water from the 9-liter bucket into the 4-liter jug until it is full (it will take 3 liters).
Step 9: You are now left with exactly 6- liters in the 9-liter bucket.