Home | CrazyEngineers

Difficulty - Hard

Total Plays - 73

Allowed Time - 15 sec

Best time - 1.063

The average of five consecutive even numbers is 24. What is the smallest number?

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Explanation:
Average = middle term = 24. Numbers = 20, 22, 24, 26, 28. Smallest = 22.

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Difficulty - Hard

Total Plays - 37

Allowed Time - 15 sec

Best time - 1.448

The ratio of speeds of two cars is 4 : 5. If the faster car covers 300 km in 3 hours, how long will the slower car take?

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Explanation:
Faster car’s speed = 300/3 = 100 km/h. Slower = 100 × 4/5 = 80 km/h. Time = 300/80 = 3.75 ≈ 4 hours.

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Difficulty - Medium

Total Plays - 33

Allowed Time - 10 sec

Best time - 1.124

A sum doubles in 8 years at simple interest. In how many years will it triple?

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Explanation:
If it doubles in 8 years, the interest earned = principal. To triple, interest = 2× principal. So time = 8 × 2 = 16 years.

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Difficulty - Hard

Total Plays - 30

Allowed Time - 15 sec

Best time - 1.411

Who designed the first programmable computer concept (Analytical Engine)?

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Explanation:
Babbage proposed the Analytical Engine, which inspired modern computing architectures.

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Difficulty - Hard

Total Plays - 30

Allowed Time - 15 sec

Best time - 0.532

What happens to electrical resistance as temperature increases in a conductor?

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Explanation:
In most conductors, higher temperature increases atomic vibrations, which hinder electron flow and raise resistance. (But in semiconductors, it’s the opposite — resistance drops!)

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Difficulty - Medium

Total Plays - 28

Allowed Time - 10 sec

Best time - 1.208

What unit measures electrical power?

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Explanation:
The watt measures the rate of energy conversion or power in an electrical circuit.

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Difficulty - Medium

Total Plays - 28

Allowed Time - 10 sec

Best time - 1.160

What does CAD stand for?

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Explanation:
CAD software helps engineers design parts and assemblies digitally before production.

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cindrilla
@cindrilla-uEN5oq • Oct 25, 2025

Oct 25, 2025

1.5K

aptitude questions

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J I J O
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Query about studying in Singapore..

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Like 3 Replies 2
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Smell detecting camera/app

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Will AI Agents Replace Engineers in the Future?

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Looking for a co-founder for a civil engineering related startup

Hi,I am an aspiring entrepreneur. Not yet hit the elusive glass ceiling but definitely intend to. I have a solution to the next big thing in the infra space. I...

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@priya-mehta • Oct 15, 2025

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Which is the best engineering branch for future?

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India’s E-Passports Are Here: Biometric Chips, Faster Travel, Zero Fraud

India just leveled up its travel game. The government has officially rolled out chip-based biometric e-passports across the country, and it’s a tech upgrade that’s got our engineering hearts racing....

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Cam for Inclined Cam Mechanism

Please let me know the manufacturing process of the cam , required for inclined Cam Mechanism equipment.

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iOS 18.4.1 Update and Issues: Balancing Critical Security Fixes with Emerging User Concerns

Apple recently released iOS 18.4.1 to patch two critical security vulnerabilities that were reportedly being exploited in targeted attacks. While the update is essential for safeguarding devices against these threats,...

Like 5 Replies 2