Puzzle 753
Which letters come next in this sequence:
NE · US · RN · ER · RS · ?
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Answer
TH.
The last two letters of the planets in reverse order from the sun.
Puzzle 754
What number comes next in this sequence:
1 · 8 · 9 · 64 · 25 · 216 · 49 · ?
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Hint
Think of squares and cubes.
Answer
512.
Each term alternates between a square and a cube, 8 3 = 512.
Puzzle 755
What number comes next in this sequence:
3 · 24 · 102 · 312 · 777 · ?
Puzzle Copyright © Kevin Stone
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Answer
1680.
This is n to the power of 5, starting with 2^5 = 32, with the last digit missing, 7^5 = 16807.
Puzzle 756
What are the next two numbers in this sequence:
202 · 122 · 232 · 425 · 262 · 728 · ? · ?
Puzzle Copyright © Kevin Stone
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Answer
293 031: these are the numbers 20, 21, 22, 23 etc grouped into three digits.
