Problem posters & prints

A Lawn Tennis Problem Anonymous

The Education Problem Joseph Swain

Free Education: A Difficult Problem Anonymous

Garbage in river Anonymous

Scenes Along The Danube, Iron Gates District Anonymous

Boy at blackboard doing math multiplication problem Anonymous

2 students professors mathematicians blackboard studying complex equations Anonymous

Boy Working on Subtraction Problem Anonymous

That Accounts for It Anonymous

1960s Couple By Car With Hood Up Looking At Motor Outdoor Problem Breakdown Anonymous

Examining Recruits for the Navy-A Knotty Problem Anonymous

Gas plant in Cologne, Germany Anonymous

Our Village Clockmaker Solving a Problem James Campbell

Quadrature of the circle Unknown

Debris from the Tohoku Tsunami Crossing the North Pacific Anonymous

1930s 1940s woman sitting in chair worried sad expression one hand up to her forehead Anonymous

1940s Sad Young Woman Lying Head On Her Hands On Table Desk Pain Sadness Worry Anonymous

Graham Hill getting ready for the French Grand Prix, Le Mans, France, 1967 Unknown

1930s Worried Business Group In Office Meeting Around The Boss' Desk Anonymous

Piles of Garbage Lying on the Street Curb Anonymous

Trash-covered beach in Aruba Anonymous

A mechanic holding up a sign, French Grand Prix, Le Mans, France, 1967 Unknown

Zaire v Scotland World Cup 1974 Monte Fresco

Science professor writing a formula for chelating agent on chalkboard Anonymous

Teen boy band uniform & tuba sitting on curb with shoes off Anonymous

Log Pile at Sawmill, Gulliver, Michigan Anonymous

The Solicitor's Office, 1857 James Jr. Campbell

Motoritis, or other interpretations of the Motor Act. Control Over Car Article IV (2), 1906. Anonymous

1950s Funny Curious Little Boy Holding Pliers Tool Taking Apart An Alarm Clock Anonymous

Water! Water! Everywhere; and not a Drop to Drink, 1849 Unknown

Hunza Valley Landslide Lake, Pakistan Anonymous

Refinery, Linden, New Jersey Anonymous

Bushfire in the Okavango Delta Anonymous

Plastic trash Anonymous

Pine Forest Logging Anonymous

Dongshuimen Bridge Construction, Chongqing, China Anonymous