9 in 1 to 100

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?




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Solve below popular number sequence
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What is the total distance covered by the bug?

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In the Mexico City area, there are two Houses H1 and H2. Both H1 and H2 have two children each.
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1. FLOW
2. SNIP
3. TRAP
4. DRAW
5. BACK

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Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

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Find the next number in the series?
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Gamers

In 2011, people playing Foldit, an online puzzle game about protein folding, resolved the structure of an enzyme that causes an Aids-like disease in monkeys. Researchers had been working on the problem for 13 years. The gamers solved it in three weeks.