All Questions
Tagged with logical-deduction number-sequence
52
questions
1
vote
0
answers
193
views
Puzzle Challenge: Unraveling the the Circular Conundrum
Known are five numbers: 1, 2, 3, 4, and 5, arranged clockwise. The number after 1 is 2, after 2 is 3, after 3 is 4, after 4 is 5, and after 5 is 1. Whenever two adjacent numbers meet, it triggers a ...
- 11
-4
votes
2
answers
224
views
If ABCDE*4 = EDCBA. A,B,C,D and E are all natural numbers ( 1-9) without repeating any natural number. Why is it deducible that E cannot be three?
If ABCDE*4 = EDCBA. ABCDE,EDCBA are five digit numbers. A,B,C,D and E are all natural numbers ( 1-9) without repeating any natural number. Why is it deducible that E cannot be three?
- 21
3
votes
2
answers
240
views
Planar Investigator
Use logical deduction to place a different digit from 1 to 9 in each circle below so that 8 of the arrows form the primes 23, 31, 41, 53, 59, 79, 89, and 97. (We view an arrow starting at digit A and ...
- 15.4k
2
votes
1
answer
127
views
How to understand this line in the solution to this puzzle?
I'm trying to understand the solution to a puzzle named "Expelled," the link to which is here. Most of the solution to the puzzle makes sense to me, except the most important part -- how to determine ...
- 123
7
votes
1
answer
318
views
Prisoner Released If ? ??
One day a prison guard noticed a series of numbers scratched on the wall of an inmate's cell. Concerned it was something to do with an escape plan, the inmate was immediately questioned.
0-2-0-4-0-0-0-...
- 2,145
3
votes
1
answer
432
views
Complete the series:
$4427, 827, 67, 31, 9, ?$
Choose between:
(a): $7$
(b): $6$
(c): $5$
(d): $4$
Looking at the numbers I think that there must be some exponential relationship but couldn't find it. I took the ...
2
votes
1
answer
135
views
What number should be in the place of "?"
I'm trying to solve this puzzle. Numbers are at triangle, and I have to solve ?-mark:
5
6 1
7 2
5 ? 7 5
Based on solutions it ...
- 31
1
vote
1
answer
191
views
Which number is the odd-one-out in the above set?
In this number set there is something common between the numbers that makes them up into a pattern.
Which one of these numbers break up the hidden pattern?
user60738
2
votes
0
answers
144
views
8
votes
2
answers
787
views
IX-NAY on the IX-SAY
Will this sequence ever have a 6 in it?
9, 1, 1, 1, 10, 3, 1, 1, 10, 5, 1, 1, 10, 1, 5, 2, 1, 1, 10, 1, 1, 1, 5, 4, 1, 1, 10, 3, 1, 1, 5, 1, 1, 1, 5, 2, 1, 1, 10, 5, 1, 1, 5, 3, 1, 1, 5, 4, 1, ...
...
- 77.9k
-5
votes
1
answer
129
views
Fibonacci again..Distinct Digits..Detail all your Deductive Steps [closed]
$ABB$
$CDE$
$GFB$
$DPGB$
$QPFR$
$RDFD$
- 5,909
2
votes
1
answer
133
views
Deduce Distinct Digits of the Given Fibonacci Sequence- Detail all Steps
$DEPUS$
$SRST$
$UDQD$
$CTQU$
$DTPR$
$PQR$
$SDE$
$VRR$
$CVV$
$DUU$
$QP$
$TT$
- 5,909
-6
votes
1
answer
91
views
Give these Digits their own Place..Place them Right
In their own Circle.
Such that the arrows point to successive numbers . Start with 1 and end with 9. There might be more arrows than necessary.
Find the solution with least number of arrows ignored.
- 5,909
3
votes
1
answer
272
views
Happy New Year?
Extend this infinite series by five more terms:
17, 3, 5, 7, 11, 17, 2, 3, 5, 11, 13, 17, 2, 5, 7, 11, 13, 2
- 5,909
13
votes
1
answer
448
views
Infinite Sequence based on Simple Rule
Using one simple rule, an Infinite Sequence has been developed.
First 30 terms are given. Can you continue the sequence for at least next Ten Terms?
Series continues from top left to bottom right.
$...
- 5,909