Numerical Jigsaw
by Erich Friedman
Arrange the six vertical strips within the rectangle above so that each row contains a true equation. Strips can be rotated 180º.
Crossword by Myles Mellor
Across
1 Tool condition problem with particles adhering to the cutting edge during chip removal, abbr.
4 Microprocessor-based controller, for short
6 Molding process which allows the rapid molding of liquid materials
7 Rotating tool with teeth arranged in a helical path
8 Rotary tool that removes hard or soft materials
10 Cutting-fluid additives that minimize chipwelding, abbr.
11 Tool coating process performed at low temperature, briefly
12 Direction of the predominant surface pattern
Down
2 Operation in which electrical current flows between a workplace and conductive tool through an electrolyte, abbr.
3 The portion of the tool body that joins the lands, on a rotating tool
5 Impact test in which a V-notched, keyhole-notched or U-notched specimen, supported at both ends, is struck by striker
6 Angle of inclination between the face of the cutting tool and the workpiece
9 Out of the ordinary
The Five-Pointed Star
A five-pointed star is made of circular spots held together by wire. The fifteen spots hold 1-15 stones (each number is used once). Each of the five circles holds 40 stones, and at the five ends of the star there are 40 stones. Fill in the circles with the correct numbers of stones.
A Simple Cryptarithm
by Henry E. Dudeney
This cryptarithm is built in such a way that first you multiply two numbers and then add to the result one extra number to get the final result. Every asterisk in this cryptarithm means some digit from 1 through 9, and every digit is used exactly once. 0 isn’t used.
The object is to replace all the asterisks with digits from 1 through 9 so that the whole calculation is correct. The solution is unique.
The Snake Cross
Among the four colored snakes (black, blue, green, and red), can you find the shortest one?
Crossword by Myles Mellor
Across
1 It has a circular blade to cut metal (2 words)
5 Tongue ____ machine
7 Paul McCartney title
8 Brass component
10 Very long time
11 Borders
Down
1 ____ iron
2 Renting out
3 Places to get product from
4 Lose strength
6 Bolivian export
9 Iron symbol
1 It has a circular blade to cut metal (2 words)
5 Tongue ____ machine
7 Paul McCartney title
8 Brass component
10 Very long time
11 Borders
Down
1 ____ iron
2 Renting out
3 Places to get product from
4 Lose strength
6 Bolivian export
9 Iron symbol
