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What is the father doing now?

The mother is 21 years older than the son, and in 6 years time she will be 5 times as old as the son. What is the father doing now?

Correct answers: 18

The first user who solved this task is Sanja Šabović.

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A salesman, tired of his job...

A salesman, tired of his job, gave it up to become a policeman.
Several months later, a friend asked him how he liked his new role.
"Well," he replied, "the pay is good and the hours aren't bad, but what I like best is that the customer is always wrong."

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Thomas Andrew Knight

Born 12 Aug 1759; died 11 May 1838 at age 78.British horticulturalist who initiated the field of fruit breeding, experimental horticulture while also studying plant physiology with botanical experiments. He made studies on the movement of sap in plants, the nature of the cambium, and phototropism in tendrils. To investigate the geotropism of roots and stems, he invented a machine, rotating to simulate gravity with centrifugal force in either horizontal or vertical position. In each case, he found the roots grew outwards and the stems inwards towards the centre. Forty years before Mendel, he studied the effects of pollen in the garden pea on seed characters. In horticulture, he investigated controlled environmental culture (greenhouses), plant nutrition, fertilization, and pest control.«

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