Orlando Letelier del Solar (1932 - 1976) was a Chilean economist, politician, and diplomat during the presidency of Salvador Allende who was assassinated by fascists via car comb on this day in 1976. After Allende was ousted in a coup and Augusto Pinochet came into power, Letelier fled to the United States and accepted several academic positions in Washington, D.C. In 1976, agents of Dirección de Inteligencia Nacional (DINA), the Pinochet regime's secret police, assassinated Letelier and his colleague Ronni Moffitt in Washington with a car bomb. These agents had been working in collaboration with members of the Coordination of United Revolutionary Organizations, a U.S.-sponsored anti-Castro militant group. According to John Dinges, author of "The Condor Years", documents released in 2015 revealed a 1978 CIA report that proved they had knowledge Pinochet ordered the murders. A State Department document also refers to eight separate CIA reports from around the same date. Pinochet, who died in 2006, was never charged for ordering these murders.

I will add the rest when I get to my computer, hexbear mobile is weird

So three comrades we need to :rat-salute: @LeninWeave, @WhoaSlowDownMaurice, and @biden.

Previous answer

From the buoy's point of view (floating downstream) the ships move away from it at equal speeds in still water. Then they return at equal speeds in still water. Thus the two ships reach the buoy simultaneously.

Who took the pencil, who took the eraser?

I turned my back on two hexbears, :sicko-hexbear: and :hexbear-retro:, and asked that one take a pencil and the other an eraser. I said: "Whoever is holding the pencil - your number is 7. Whoever is holding the eraser - your number is 9."

(One number should be prime, the other composite but not divisible by the first.)

":hexbear-retro:, multiply your number 2. :sicko-hexbear: multiply your number by 3."

(One number should be a divisor of the composite number you called out, as 3 is a divisor of 9. The other number should not share any factor but 1 with the first.)

"Add your products and tell me the sum."

If the sum is divisible by 3, :sicko-hexbear: took the pencil. If not, :sicko-hexbear: took the eraser.

Why?

Like usual have fun :soviet-heart: and dm @Wmill the answer.