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Quiz about Logics and Riddles II
Quiz about Logics and Riddles II

Logics and Riddles II Trivia Quiz


This is my second one in this category. Again, it's all about numbers. Enjoy.

A multiple-choice quiz by wimm. Estimated time: 3 mins.
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Author
wimm
Time
3 mins
Type
Multiple Choice
Quiz #
48,517
Updated
Dec 03 21
# Qns
5
Difficulty
Average
Avg Score
3 / 5
Plays
16203
Last 3 plays: Guest 73 (1/5), Harish123az (3/5), Guest 66 (3/5).
Question 1 of 5
1. Fill in the blank: 4, 9, 25, 49, 121, ... ? Hint


Question 2 of 5
2. Take a 3 by 3 square. The first row reads 1, 2, 3. The second: 4, 5, 6. The last one: 14, 19, xx Which number is missing?

Answer: (number)
Question 3 of 5
3. Fill in the blank: 1, 3, 5, 11, 21, 43, ...? Hint


Question 4 of 5
4. Can you divide 10230 by 3 and get a natural number?


Question 5 of 5
5. The sum of the even numbers between 1 and 21 equals?

Answer: (number)

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Most Recent Scores
Oct 23 2024 : Guest 73: 1/5
Oct 22 2024 : Harish123az: 3/5
Oct 15 2024 : Guest 66: 3/5
Oct 10 2024 : Guest 81: 0/5
Oct 10 2024 : Guest 23: 2/5
Oct 07 2024 : Fiedler: 5/5
Oct 02 2024 : davtrtmn: 0/5
Sep 28 2024 : triviabore: 2/5
Sep 09 2024 : Guest 204: 2/5

Score Distribution

quiz
Quiz Answer Key and Fun Facts
1. Fill in the blank: 4, 9, 25, 49, 121, ... ?

Answer: 169

The list is formed by the squares of the prime numbers. 13 is the next prime number, and 13 x 13 = 169.
2. Take a 3 by 3 square. The first row reads 1, 2, 3. The second: 4, 5, 6. The last one: 14, 19, xx Which number is missing?

Answer: 24

Multiply the first row by 2 and the second row by 3. The sum of this gives you row 3.
3. Fill in the blank: 1, 3, 5, 11, 21, 43, ...?

Answer: 85

Each number is the previous multiplied by 2 +-1. 3 = 1 x 2 +1, 5= 3 x 2 -1, 11 = 5 x 2 +1, etc... So 43 x 2 -1 = 85. Or another solution might be: if the first number is A and the second B then the third number C is = 2A + B
4. Can you divide 10230 by 3 and get a natural number?

Answer: Yes

To check if a number can be divided by 3, just add up all the figures from the number and if this sum can be divided by 3, so can the original number. So: 1+0+2+3+0=6 and 6 can be divided by 3.
5. The sum of the even numbers between 1 and 21 equals?

Answer: 110

The formula: (n x (n+2)):4 with 'n' the highest even number of the serie. So 20 x 22 : 4 equals 110...
Source: Author wimm

This quiz was reviewed by FunTrivia editor gtho4 before going online.
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