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Pratima Singh

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44. Navodit Gupta 224
45. Kishan Sharma 217
46. Pratima Singh 215
47. Irena Katic Kuzmanovic 214
48. James Lillard 202
last 3 solved tasks
MATH PUZZLE: Can you replace the question mark with a number?
MATH PUZZLE: Can you replace the question mark with a number?
I am a potato's favorite tool and I give him a lot of power. You can sit with me all day but when my energies drain my partner would only respond to your touch. What am I?

Frederick George Donnan

Died 16 Dec 1956 at age 86 (born 5 Sep 1870).British chemist, born in Ceylon, whose research contributed to the development of colloid chemistry. He is remembered for his investigation of the Donnan Effect (1911) which advanced the understanding of the living cell. This is the effect of a semi-permeable membrane between two electrolytes and the electrical potential thereby produced. In other work with soap solutions, he related the efficiency of hydroxyl ions in the emulsification of oils to the formation of soaps on the surface of the drops. In wartime, he worked on the industrial-scale synthesis of ammonia and nitric acid. He was blind in one eye.«

Potty Trained

While carpenters were working outside the old house I had just bought, I busied myself with indoor cleaning. I had just finished washing the floor when one of the workmen asked to use the bathroom.

With dismay I looked from his muddy boots to my newly scrubbed floors. “Just a minute,” I said, thinking of a quick solution. “I’ll put down newspapers.”

“That’s all right, lady,” he responded. “I’m already trained.”

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