Puzzle 197
What number comes next in this sequence? There are two possible answers, can you find them both?
1 · 23 · 124 · 1251 · 26127 · 128129 · ?
Puzzle Copyright © Kevin Stone
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Hint
Try removing the spaces from the sequence.
Answer
1301311 or 1210121.
Reasoning
Removing spaces from the original sequence gives:
123124125126127128129
Now adding spaces back in:
123 124 125 126 127 128 129
Answer #1
The next few terms could be the next 3 numbers:
123 124 125 126 127 128 129 + 130 131 132
Remove the spaces:
123124125126127128129130131132
Now break the sequence into chunks of increasing size:
1 23 124 1251 26127 128129 1301311
One possible answer is 1301311.
Answer #2
The next few terms could be 12 + 10, 12 + 11, 12 + 12:
123 124 125 126 127 128 129 + 1210 1211 1212
Remove the spaces:
123124125126127128129121012111212
Now break the sequence into chunks of increasing size:
1 23 124 1251 26127 128129 1210121
Another possible answer is 1210121.
Puzzle 198
Can you draw a continuous line that goes through every number in order, starting with 1, and ending with 6?
You can only move horizontally and vertically, every square must be visited, and the line must not cross itself.
Note: this puzzle is not interactive, and the numbers cannot be clicked.
Puzzle Copyright © Cihan Altay
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Hint
From the 1 go straight down.
Answer
Puzzle 199
How many times can you take 7 away from 49?
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Hint
This is a trick question.
Answer
Once.
After which you will be taking 7 from 42!
Puzzle 200
What is the name of this city?
Puzzle Copyright © Lloyd King
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Hint
Why does each column start with A, B, C?
Answer
Chicago.
Reasoning
Look at the letters at the bottom of each stack.
