About a Dahlicious life

September 13 was Roald Dahl’s 95th birth anniversary. Find out more about the author from this video.

About a Dahlicious life
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Get some mental exercise

Here are some maths-related puzzles for a brain workout. How many can you get right?

Solving puzzles is a complete brain exercise as it exercises both the right and left sides. Gear up this weekend as you wear your thinking cap on!

Stay symbolic
Can you make this equation correct using three of these four symbols? + – x ÷


On Strike
Which pins must be knocked over to score exactly 100 points?


Go figure
Enter numbers in each row and column to arrive at the end total. Remember only numbers 1 through 9 can be used, and that too only once.


Right on track

All Aboard? Hop on for a quick ride to know about the various types of trains that have been created with the changes in technology.

Whether it is to travel within a city, or from one state to another, or even across borders, trains are a popular mode of transportation. Trains can be sorted into several distinct categories, separated by the way their locomotives (the engines) are powered, their use, and the design of their tracks. Here’s a look at some of the different types of trains that can be found across the world:

Cuddly critters

Australia celebrates one of its famous marsupials on September 24 to raise awareness about its protection.

Koala bears are known for looking cuddly and cute. But did you know that they are not really bears but marsupials like kangaroos, wombats, and wallabies?

Koalas are picky but BIG eaters – they can eat up to one-kilo eucalyptus leaves in a day! And they make sure to choose only the most nutritious and tastiest leaves from the trees.

Found in the eucalyptus forests of eastern Australia, these mammals’ survival is threatened because of loss of habitat and food source – the eucalyptus trees.

Keeping this in mind, Australia observes the month of September as Save the Koala Month and September 24 as Save the Koala Day.

A Koala seen at the Moonlit Sanctuary near Melbourne, Australia. Photo: Robert Blackburn/Visit Victoria

Can you spot the 5 differences between the two pictures? (Click on the differences in the image below)

Which colour are you?

Different colours mean different things. Which colour reflects your personality most?

Different colours symbolise different things. For instance, blue is perceived to be conservative while red signifies power and aggression. Brighter colors like orange represent warmth not only in terms of emotions but also temperature. So, what colour are you? Take this personality quiz to find out.

Finding fitness

Can you spot all 10 fun exercises in the grid? Get started with this interactive task now.

Staying fit need not always involve complicated and serious workouts. Sometimes you can draw benefits from easy-to-do, fun exercises that you can even try out at home. There are 10 such examples hidden in the grid below. Can you spot all of them?

Quiz Whizz – September 22, 2021

How tuned in are you to the world around? Find out with this quiz.

It’s Quiz Time, folks. Here are a set of questions to get your grey cells buzzing. How many do you know the answers to?

The light of knowledge

Part #13: At Tripura, Meghnath meets Sukracharya and dives straight into learning. His first lesson: about electrolysis.

Vaihasaya slowly landed in Tripura on top of a beautifully built palace. The whole city was lit up with electric lights. Meghnath was amazed by this technology.

Below each light was a huge clay pot with copper rods and zinc/iron in the middle. Another thin rod made of tungsten was connected to it with a wire. Looking at these, Meghnath thought the clay pots were similar to what the sages carried. But there was a difference.

As he stepped in, he saw a huge flag pole, below which was another huge clay pot with a similar setup. On top of the pole, he saw a small spark of light.

Longed-for meeting

Meghnath looked at Mayasura and Ravana. The former said, “Ask Sukracharya when you meet him.” They stepped inside the guru’s building and there sat Sukracharya, with a clay pot in his left hand and a lengthy metal rod with its top part split into two (like an antenna), in his right.

Sukracharya: Welcome to Tripura. Looks like Meghanth has many questions. Go ahead, child. Clarify your doubts.

Meghanth: Thank you, guru. Outside, I saw the light, which seems to be different and artificially created. How it is possible? What is this mysterious clay pot that is everywhere?

Sukracharya: The pot is a battery to store electricity. To understand that idea, you must first know about a process called electrolysis. First, tell me what is electricity?

Meghanth: Not sure. All I know is lighting, which we see during rain and thunder, is a form of current or electricity, which is basically “flow of electrons”.

Sukracharya: Perfect… If you can understand flow of electrons and how they exchange among each element or electricity, light, telecommunication concept. To learn this, let me teach you how to separate water. What is water?

Meghnath: It is one part of Pranavayu (Oxygen) and two parts of Udajani (Hydrogen).

Sukracharya: Do you know how to separate them?

Meghnath: No.

Sukracharya: Take some water, salt and take a non-conductive bowl (clay pot, glass bowl, etc). For learning, let’s take a ready-made battery.

When they put salt inside the water and send electricity inside, Meghnath sees bubbles coming out of the negative and positive terminals; with more in the former and less in the latter.

Creating a spark

Meghnath: Hydrogen is coming out from the negative side, and oxygen from the positive side. But, what’s happening?

Sukracharya: This process is called electrolysis; by which a compound/substance like water decomposes or breaks down into simpler substances when current is passed into them. But, for this to happen, there must be some substance which supply ions, which we call it as electrolyte. Here, we use salt (NaCl – Sodium Chloride) as electrolyte.

Meghnath: Guru, I want to learn how to create current and create a spark of light…

Sukracharya: This is just the start. More will follow.

Meghanth begins to try different methods to store separated oxygen and hydrogen in a metal container, as Sukracharya watches with a smile.

The author is the founder and CEO of Vaayusastra Aerospace, an IIT-Madras incubated ed-tech startup that offers Air Science workshops for children between five and 14 years.

Now that you have read a bit more of Meghnath’s fascinating journey, here are some questions from the story. How many can you answer?

Water: The elixir of life

Everyone knows how important water is for our daily life. Check out this crossword to see how many words associated with water you know.

One of the most important requirements for life is water. Around 71% of Earth’s surface is water and around 60% of the adult human body is also composed of water.

Here is a crossword themed around this precious liquid. Find out how much you know about it.