Today's Daily Quiz is Live — Test your knowledge & improve your rank
|
Interview Brain Teasers Medium 2 min

A clock is losing time at a constant rate. It loses 2 minutes every hour. If it is correct at 8 AM, what will it show at 6 PM?

Hint
There are 10 real hours between 8 AM and 6 PM.

Answer

5:40 PM.

Explanation

The clock loses 2 minutes per hour for 10 hours, for a total loss of 20 minutes.

Step-by-Step Solution

10 hours × 2 minutes = 20 minutes.
6:00 PM - 20 minutes = 5:40 PM.
6 puzzles
You have eight identical-looking balls, but one is heavier than the others. Using a balance scale, what is the minimum number of weighings needed to identify the heavier ball?
10 views Interview Brain Teasers
Medium
You have 9 identical-looking balls and one is heavier. What is the minimum number of balance-scale weighings needed to find it?
10 views Interview Brain Teasers
Hard
An interviewer gives you two ropes. Each rope takes exactly one hour to burn, but they do not burn at a uniform rate. How can you measure exactly 30 minutes?
13 views Interview Brain Teasers
Medium
You have a building with 100 floors and two identical glass balls. You need to determine the highest floor from which a ball can be dropped without breaking, while minimizing the worst-case number of drops. What is the classic strategy based on?
19 views Interview Brain Teasers
Hard
You have 8 identical-looking balls and one is heavier. What is the minimum number of balance-scale weighings needed to guarantee finding it?
11 views Interview Brain Teasers
Medium
Why are manhole covers usually round rather than square?
10 views Interview Brain Teasers
Medium