Manhole Shape

Why do we preferably have round manhole covers and not square ones?




Similar Riddles

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

Asked by Neha on 17 May 2021


An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?

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Can you replace the question mark with the correct number in the below table sequence?

Complete the table Sequence

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Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

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Find the missing number in the sequence below:

Find the missing number

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On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

Asked by Neha on 26 Oct 2024


A research team went to a village somewhere between the jungles of Africa. Luckily for them, they reached the day when quite an interesting custom was to be performed. The custom was performed once a year as they confirmed and was performed in order to collect the taxes from every male of the region.

The taxes were to be paid in the form of grains. Everyone must pay pounds of grain equaling his respective age. This means a 20-year-old will have to pay 20 pounds of grain and a 30-year-old will pay 30 pounds of grain and so on.

The chief who collects the tax has 7 weights and a large 2-pan scale to weigh. But there is another custom that the chief can weigh only three of the seven weights.

Can you find out the weights of the seven weights? Also, what is the maximum age of the man that can be weighed for the payment of taxes?

Asked by Neha on 12 Jan 2025

Take one out and scratch my head, I am now black but once was red. What am I?

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There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

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What number comes next in this sequence:
7 8 5 5 3 4 4 _

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Gambling

In Canada, a mathematical puzzle must be solved in order to win the lottery to classify it as a “game of skill” not gambling.