Tag: math & puzzles

Questions Related to math & puzzles

1 3 3 6 5 9 7 12 9

  1. 15

  2. 13

  3. 14

  4. 10


Correct Option: A
  1. 16

  2. 14

  3. 18

  4. 24


Correct Option: C
Explanation:

To solve this question, you need to determine the number of chimes and the time gap between each chime from 1 o'clock to 6 o'clock.

At 1 o'clock, there is 1 chime. At 2 o'clock, there are 2 chimes. At 3 o'clock, there are 3 chimes. At 4 o'clock, there are 4 chimes. At 5 o'clock, there are 5 chimes. At 6 o'clock, there are 6 chimes.

The time gap between each chime is 3 seconds.

To calculate the time it takes to know the time after the first chime, you need to add up the time gap between each chime.

For example, to know the time after the first chime at 6 o'clock, you need to add up the time gap between each chime from 1 o'clock to 6 o'clock:

(1-1) + (2-1) + (3-1) + (4-1) + (5-1) + (6-1)

Simplifying this, you get:

(0) + (1) + (2) + (3) + (4) + (5)

Adding these numbers together, you get a sum of 15.

However, this sum does not include the first chime, so you need to add 3 more seconds to account for the time it takes for the first chime to be heard.

Therefore, the total time it takes to know the time after the first chime at 6 o'clock is 15 + 3 = 18 seconds.

Hence, the correct answer is C. 18.

There is a village that has five fortune tellers. The first fortune teller's prediction has 75 % chance of being correct. The second has 56 % chance of being correct, the third 49 %, the fourth 26 %, and the fifth 9 %. If you were trying to get the best prediction of your future, which fortune teller would you go to?

  1. First

  2. Second

  3. Third

  4. Fourth

  5. Fifth


Correct Option: E

AI Explanation

To determine the best fortune teller to go to for the most accurate prediction, we need to consider the probability of each fortune teller's prediction being correct.

Let's analyze each option:

Option A) First - The first fortune teller has a 75% chance of being correct. Option B) Second - The second fortune teller has a 56% chance of being correct. Option C) Third - The third fortune teller has a 49% chance of being correct. Option D) Fourth - The fourth fortune teller has a 26% chance of being correct. Option E) Fifth - The fifth fortune teller has a 9% chance of being correct.

Since we want the best prediction, we should choose the fortune teller with the highest probability of being correct. Among the given options, the fifth fortune teller has the lowest chance of being correct (9%). Therefore, the correct answer is option E) Fifth.

Choosing the fortune teller with the highest probability of being correct increases the likelihood of receiving an accurate prediction.

It was Diane 's first day at school. The teacher suggested that it would be a good idea for each child to meet every other child in the class. The teacher said, "When you meet, please shake hands and introduce yourself by name." If there were 15 children in the class, how many total handshakes were there?

  1. 100

  2. 80

  3. 60

  4. 105

  5. 210


Correct Option: D

Which letter replaces the question mark ?

  1. E

  2. M

  3. N

  4. O


Correct Option: B