Who was the only World Heavyweight boxing champion to retire undefeated?

After starting his career with a 48-0 record, Larry Holmes lost his heavyweight title with which fighter?

What famous video game featured Mike Tyson as the final boss?

Amir Khan won the Commonwealth lightweight title in July 2007 at the O2 but who put him on the floor before losing?

When is National Science Day celebrated every year in India?

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Which prize is given by the UNESCO for Popularization of science ?

Which country’s plane Tu-154, on December 25, crashed on its way to Syria in the Black Sea with 92 people onboard?

Where was the so-called Black War fought between the mid 1820s and 1832?

When and who invented microchip technology?

Five. It works out that a mechanic can repair 1 car in an hour. Five mechanics could actually repair 25 cars in 5 hours, but 4 mechanics would be able to repair no more than 20 cars, so there would need to be at least 5 mechanics for 22 cars.

If 15 men take 21 days of 8 hours each to do a piece of work. How many days of 6 hours each would 21 women take, if 3 women do as much work as 2 men?

If it takes 4 minutes to cut a log into 4 pieces, how many minutes will it take to cut a log into 3 pieces?

Assume all cuts are parallel, and cuts are done sequentially (not simultaneously).

If you take a 3 X 3 X 3 Rubik cube and break it up into 27 cubes, how many cubes would have stickers on exactly 2 faces ?