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Calculate the number 1998

NUMBERMANIA: Calculate the number 1998 using numbers [7, 9, 3, 8, 42, 474] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 20

The first user who solved this task is Sanja Šabović.

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Millenium Bridge

In 2000, the Millenium Bridge - a footbridge across the River Thames - was opened by Queen Elizabeth. The radical new design was the work of architect Sir Norman Foster with sculptor Sir Anthony Caro and engineering support from Arup. It was the first new crossing of the River Thames in over 100. As the first few thousand people crossed the bridge, it developed an unexpected and potentially dangerous lateral "wobble". This caused people to unwittingly walk "in step", which increased the oscillation. The design had been adapted from a computer model typical for a car bridge, but which did not take into account the lateral forces associated with human walking. After structural damping was added to stop the oscillation, the bridge re-opened in 2002.«

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