Hard Number Series Puzzle

What number comes next in the series?

5 15 5 18 5 24 14 20 _




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There is a circular car race track of 10km. There are two cars, Car A and Car B. And they are at the exact opposite end to each other. At Time T(0), Both cars move toward each other at a constant speed of 100 m/seconds. As we know both cars are at the same speed they will always be the exact opposite to each other.
Note, at the center, there is a bug which starts flying towards Car A at time T(0). When the bug reaches car B, it turns back and starts moving towards the car A. The speed of bug is 1m/second. After 5 hours all three stop moving.
What is the total distance covered by the bug?

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Can you find out the next digit in the following series ?

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> Pin
> Check
> Boiling
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What has one eye, but can’t see?

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A maths symbol is hidden in the below Bar Graph. Can you decipher it?

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You walk into a room where there are three primates held in their respective cages:
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Who is the most intelligent primate in the room?

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How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

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Two friends decide to get together; so they start riding bikes towards each other. They plan to meet halfway. Each is riding at 6 MPH. They live 36 miles apart. One of them has a pet carrier pigeon and it starts flying the instant the friends start traveling. The pigeon flies back and forth at 18 MPH between the 2 friends until the friends meet.

How many miles does the pigeon travel?

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It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

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Rubik’s Cube

The inventor of the Rubik’s Cube didn’t realize he’d built a puzzle until he scrambled it the first time and tried to restore it.