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Category Elimination - Numbers (Hard Version)

In each group, name any answer which matches the first category to reveal the second category, then name any answer which applies to both categories to reveal a third, and so on.
You will get a hint on the last prompt of a category
None of these are going to require tedious math (e.g. 37 * 29). Remember to try easy cases first like 37*2*5 = 37*10 = 370.
# = the number of answers possible. Answer must correspond to the highlighted yellow box.
Original Category Elimination - Numbers by Stewart. Also try more in this series!
Quiz by Dollyfroggy
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Last updated: August 24, 2022
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First submittedJuly 22, 2022
Times taken694
Average score65.0%
Rating4.57
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Keep scrolling down for answers and more stats ...
Green Categories
1000
Integer between 0 and 1000
✓
63
... with its digits adding up to 10
✓
39
... that shares a factor with 60
✓
14
... with a 0
✓
1
... that is a multiple of 27
640
What can you multiply 2^7 by to get a 0 in it?
 
Orange Categories
120
3-digit integer with digits in descending order
✓
56
... with no consecutive numbers
✓
28
... with a two-digit largest prime factor
✓
18
... not starting with 9
✓
1
... with a largest prime factor between 80 and 90
830
What two one-digit numbers would make it really easy to try different primes?
Blue Categories
34
Year from 1950 to 2020 that no country joined the UN in
✓
18
... that is odd
✓
7
... with all unique digits
✓
3
... that is a multiple of 3
✓
1
... but doesn't end in 3
2019
The last country to join was in 2011, see if any recent years work.
 
Purple Categories
59
Integer with 4 factors between 1 and 200
✓
30
... with two non-zero digits
✓
17
... that is not divisible by 2
✓
4
... with only one-digit prime factors
✓
1
... that has only one prime factor
27
How can a number have 1 prime factor but 4 factors?
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2 Comments
ponnuki
+3
Level 58
Aug 24, 2022
"Year from 1950 to 2020 that no country joined in" - specify WHAT no country joined in.
Dollyfroggy
+1
Level 60
Aug 24, 2022
Oops! Thank you.
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