updated 2019-06-11
How many cookies could you eat on an empty stomach? (1)
letters: It occurs once in a minute, twice in a week, and once in a year. What is it?
Here are a few “level 1” (easy?) puzzles
12 ?
Assuming all blocks that are not visible from this angle are present, how many blocks have been removed
from this 4 x 4 x 4 block?
16 ?
24 ?
3 ?
A ?
C ?
Gears
gears alternate in rotation:
If you turn the gear in the bottom corner counterclockwise,
which way will the geared bar slide? Downward to the left or
upward to the right?
If you turn gear F counterclockwise, which way will gear A turn?
c.w. ?
d ?
which of the connected gears turns the fastest?
which of the top 3 turns fastest?
[ the 3 are the same size ]
[ of course, the bottom one, “4”, turns even faster. ]
how do bicycle gears work?
How is it that the smallest gear on the
back wheel enables you to go the fastest?
1 ?
Maze
a maze with elevators
Pictures
Starting with “A” find the 1 difference between it and the next motorcycle and rider.
There is 1 difference in each picture – all the way to picture “E”.
Find the two trains that are the same . . .
and different from all the others.
a,b ?
a,e,c ?
b,f,c ?