Penumbra

© Skillitani Puzzles

How to Submit

Send your answers along with your full name to skillitani@gmail.com. Retries are not permitted.

There is no time limit, so take as long as necessary to maximize your score. However, do not discuss the puzzles with anyone, including artifical intelligence.


Spatial Section

Instructions

For each problem, choose the letter corresponding to the figure that best complements the set. The problems are arranged by increasing difficulty.

Problem 1

Problem 1

Problem 2

Problem 2

Problem 3

Problem 3

Problem 4

Problem 4

Problem 5

Problem 5

Problem 6

Problem 6

Problem 7

Problem 7

Problem 8

Problem 8

Problem 9

Problem 9

Problem 10

Problem 10

Problem 11

Problem 11

Problem 12

Problem 12

Problem 13

Problem 13

Problem 14

Problem 14

Problem 15

Problem 15

Numerical Section

Instructions

For each series, find what replaces the question mark(s). A calculator, pencil, and paper are allowed. The series are arranged by increasing difficulty.

16) 34, ?, 89, 17, 1819, 19, 2021, 5

17) 36, 216, 432, 1296, 11664, 69984, ?

18) 3, 4, 10, ?, ?, 74666872

19) 3, 12, 4, 90, 78, 5, ?

20) 623, 949, 1898, 10879, ?

21) 2345, 6345, 61245, 61845, ?

22) 73746251, 848362, ?, 104

23) 1, 22, 333, 4250, ?, 87275777

24) 3, 63, 69, ?, ?, ?, 123

25) 3, 63, 3636, 63636, 6363636, 66363636, 3663636366, ?

26) 3, 63, ?, 4815, 80226, 694647, 2597598

27) 36, 3/23, 3/213/2, ?, 3/211/21/213/211/2

28) 15411, 71711, ?, 4617

29) 6253, 464, 1101, ?

30) 1, 10, 115, ?, 1161730


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