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?

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

Which was the first movie of Irrfan Khan?

Which boxers was the oldest man ever to win the heavyweight title?

Who invented Fountain Pen?

Does Human have more than 5 senses?

How is MongoDB better than other SQL databases?

Which was the first film produced by Madhubala?

A 30" x 30" square metal plate needs to be fixed by a carpenter on to a wooden board. The carpenter uses nails all along the edges of the square such that there are 31 nails on each side of the square. Each nail is at the same distance from the neighboring nails. How many nails does the carpenter use?

Answer: 120

Let consider each corner consists 1 nails so nails in the corner =4, To count the 31 nails each edge need to put just 29 more nails at each edge , so nails 29 X 4 = 116.

so the total Nails = 116 + 4 = 120.

Jatin and Nihal together can complete a work in 10 days. They plan to do the job in a different way. On the first day Jatin works whereas Nihal works for the next 2 days and this pattern is repeated again and again. If they finish the work in 18 days, then in how many days could the man who finishes the work do this work alone ?

Excluding stoppages the speed of a bus is 54 km/hr and including stoppages it is 45 km/hr . For how many minutes does the bus stop per hour ?