Q215: You flip 2 fair coins once.
What’s the probability of getting at least one head?
What’s the probability of getting at least one head?
Anonymous Quiz
44%
1/2
6%
2/3
25%
3/4
25%
1/4
👍1
Q216: Three friends check into a hotel room costing £30. They each pay £10.
Later, the hotel realises there was a discount. The room should have cost £25, so the clerk gives £5 to the bellboy to return.
The bellboy, being sneaky, keeps £2 and gives each friend £1 back.
So now:
Each friend paid £9 (since they got £1 back)
£9 × 3 = £27
Bellboy kept £2
£27 + £2 = £29
Where did the missing £1 go since we had £30 to start with?
See options below ⬇️
@RiddlesRepository
Later, the hotel realises there was a discount. The room should have cost £25, so the clerk gives £5 to the bellboy to return.
The bellboy, being sneaky, keeps £2 and gives each friend £1 back.
So now:
Each friend paid £9 (since they got £1 back)
£9 × 3 = £27
Bellboy kept £2
£27 + £2 = £29
Where did the missing £1 go since we had £30 to start with?
See options below ⬇️
@RiddlesRepository
❤3👍1
Q216: Where did the missing £1 go? (see question above)
Anonymous Quiz
8%
The bellboy has it
17%
The hotel has it
65%
There is no missing £1
9%
The three friends has it
❤1👍1
Q217: A father says to his son:
“I am twice as old as you were when I was as old as you are now.” If the father is 40 years old, how old is the son?
“I am twice as old as you were when I was as old as you are now.” If the father is 40 years old, how old is the son?
Anonymous Quiz
63%
20
9%
25
5%
26
23%
30
❤6
Q218:
Five people need to cross a river at night:
Each person takes the following minutes to cross
Person A: 1 min
Person B: 2 min
Person C: 5 min
Person D: 10 min
Person E: 15 min
Rules:
1. The boat can carry at most 2 people.
2. They must carry a torch to cross. There’s only 1 torch, and someone must bring it back each time.
3. When two people cross, they move at the slower person’s speed.
Question:
What is the minimum total time for all five to cross?
See options below ⬇️
@RiddlesRepository
Five people need to cross a river at night:
Each person takes the following minutes to cross
Person A: 1 min
Person B: 2 min
Person C: 5 min
Person D: 10 min
Person E: 15 min
Rules:
1. The boat can carry at most 2 people.
2. They must carry a torch to cross. There’s only 1 torch, and someone must bring it back each time.
3. When two people cross, they move at the slower person’s speed.
Question:
What is the minimum total time for all five to cross?
See options below ⬇️
@RiddlesRepository
❤2🥱1
Q218: Question:
What is the minimum total time for all five to cross?
What is the minimum total time for all five to cross?
Anonymous Quiz
13%
25
21%
28
10%
30
39%
35
8%
45
2%
50
7%
60
❤5👍1
Q219:
Three painters, A, B, and C, are painting a house.
Painter A can finish the house in 6 hours
Painter B can finish it in 8 hours
Painter C can finish it in 12 hours
If:
A and B start working together, but after 2 hours, A leaves.
Then B and C continue working together until the house is finished.
Question:
How long in total does it take to finish the house?
See options below ⬇️
@RiddlesRepository
Three painters, A, B, and C, are painting a house.
Painter A can finish the house in 6 hours
Painter B can finish it in 8 hours
Painter C can finish it in 12 hours
If:
A and B start working together, but after 2 hours, A leaves.
Then B and C continue working together until the house is finished.
Question:
How long in total does it take to finish the house?
See options below ⬇️
@RiddlesRepository
❤3
Q219:
Question: How long in total does it take to finish the house?
Question: How long in total does it take to finish the house?
Anonymous Quiz
38%
4 hours
23%
5 hours
27%
6 hours
13%
7 hours
❤5🤡3👍1
You can always check https://t.me/RiddlesRepositoryAnswers
to see the explanations for the correct answers.
to see the explanations for the correct answers.
👍2❤1
👍1
Did You Know the 1089 Number Trick?
There’s a maths trick that always ends in 1089, no matter what number you start with (as long as you follow one rule).
Here’s how it works:
1️⃣ Pick any 3-digit number where the first digit is bigger than the last. Example: 732
2️⃣ Reverse the number → 237
3️⃣ Subtract the smaller number from the bigger one → 732 − 237 = 495
4️⃣ Reverse your new number → 594
5️⃣ Add the new number and the result of your subtraction together → 495 + 594 = 1089
And just like that… you get 1089. It works every single time. Try it with a different number and watch the magic happen.
#DidYouKnow
@RiddlesRepository
There’s a maths trick that always ends in 1089, no matter what number you start with (as long as you follow one rule).
Here’s how it works:
1️⃣ Pick any 3-digit number where the first digit is bigger than the last. Example: 732
2️⃣ Reverse the number → 237
3️⃣ Subtract the smaller number from the bigger one → 732 − 237 = 495
4️⃣ Reverse your new number → 594
5️⃣ Add the new number and the result of your subtraction together → 495 + 594 = 1089
And just like that… you get 1089. It works every single time. Try it with a different number and watch the magic happen.
#DidYouKnow
@RiddlesRepository
❤7🥴3👍1
Q222: Solve for x: √(x+9) = x - 3
Anonymous Quiz
4%
0, 1
51%
0, 7
7%
3, 6
31%
No solution
6%
6
0%
12
👍1
👍2
Q224: Find the value of x: (1/(x-1)) + (1/(x+1)) = 1
Anonymous Quiz
52%
1±√2
21%
-1±√2
17%
1±2√2
10%
2±√8
❤1
Q225: In which country is it illegal to chew gum unless it is for medical or therapeutic reasons?
Anonymous Quiz
37%
Japan
48%
Singapore
14%
Switzerland
1%
Australia
🤣8
Q226: In which country is it technically illegal for a chicken to cross the road in a certain city?
Anonymous Quiz
17%
United Kingdom 🇬🇧
21%
United States 🇺🇸
45%
Australia 🇦🇺
17%
Canada 🇨🇦
Q227: Which country has the most time zones in the world?
Anonymous Quiz
34%
United States 🇺🇸
46%
Russia 🇷🇺
12%
China 🇨🇳
7%
France 🇫🇷
❤1