Editors Pick

Updated on Jan 29, 2025 08:28 AM IST

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Problematics | The truth about drinking

Two habitual liars and a truthful friend get drunk in a bar. Who drinks what?

Updated on Jan 27, 2025 10:14 AM IST

Number Theory: Going after skilled Indian workers in the US may backfire

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US President Donald Trump holds up an executive order after signing it in Washington on Tuesday.(AP)

Updated on Jan 22, 2025 08:58 AM IST

ByRoshan Kishore

Number Theory: Indispensable yet invisible — What India’s tribal farmers need

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A farmer carries vegetables on his head during a foggy day in Kolkata.(Photo by Samir Jana/ Hindustan Times)

Published on Jan 21, 2025 08:58 AM IST

BySourindra Mohan Ghosh, Nivedita Sharma

Problematics | Cubic calendar

Two cubes, a little larger than ludo dice, carry some digits that you can see and some that you cannot. What are the ones you cannot see?

Published on Jan 20, 2025 02:29 PM IST

Number Theory: How much of the world does the US fund?

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Published on Jan 20, 2025 08:45 AM IST

Number Theory: How much of the world does the US fund?

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Outgoing US President Joe Biden (right) with President-elect Donald Trump in the Oval Office at the White House in Washington.(REUTERS)

Published on Jan 17, 2025 08:34 AM IST

Number Theory: Why Congress cannot decide what to do with AAP

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Congress MP Rahul Gandhi (left) with Aam Aadmi Party national convener Arvind Kejriwal.(PTI File Photo)

Published on Jan 16, 2025 09:03 AM IST

ByRoshan Kishore, Nishant Ranjan

Number Theory: Demand, welfare, growth — The Budget’s trilemma

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Updated on Jan 15, 2025 09:07 AM IST

ByRoshan Kishore

Number Theory: $70 billion of reserves gone in 14 weeks

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Published on Jan 14, 2025 09:03 AM IST

Problematics | Books on a library shelf

Hundreds of books on seven library shelves, unevenly distributed before being shared equally. How many were on each shelf in the beginning?

Published on Jan 13, 2025 02:26 PM IST

Number Theory: Rain records tumble in face of climate crisis

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Light rainfall in parts of Delhi as temperatures drop on a cold winter morning in January 2025. (Vipin Kumar/HT Photo)

Updated on Jan 13, 2025 09:46 AM IST

An exemplar of good conduct and conscience

Dr Manmohan Singh was one of the rare Indian politicians whose inner goodness was evident to even his political and ideological opponents

File photo of the then Prime Minister Manmohan Singh, in New Delhi.(HT_PRINT)

Published on Jan 12, 2025 08:26 AM IST

ByM Damodaran

Ricky Gill likely to be Trump’s top NSC India hand, David Feith for tech role

If appointed, both Ricky Gill and David Feith will report to Trump’s national security advisor pick Michael Waltz

Published on Jan 11, 2025 09:05 PM IST

ByPrashant Jha

Number Theory: Five datasets show 1.5°C breach in 2024

All these datasets except one show that 2024 was warmer than the pre-industrial baseline by more than 1.5°C.

Updated on Jan 11, 2025 10:48 AM IST

Number Theory: What's fanning the wildfires in California?

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A building fully engulfed in flames in a wildfire in Altadena area of Los Angeles county, California on January 8.(AFP)

Published on Jan 09, 2025 09:19 AM IST

Number Theory: Can AAP win Delhi for the third time?

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AAP national convenor Arvind Kejriwal (centre) with Delhi CM Atishi (to his right) and party leaders Raghav Chadha, Sanjay Singh and others.(PTI)

Published on Jan 07, 2025 04:10 PM IST

ByNishant Ranjan

India-Canada ties under Trudeau: How promise of sunny days gave way to distrust

It could take years to overcome the animosity instilled during the near-decade of Justin Trudeau’s regime

Canada Prime Minister Justin Trudeau announces his resignation as Liberal leader and prime minister outside Rideau Cottage in Ottawa on Monday, (AP)

Updated on Jan 06, 2025 10:41 PM IST

ByAnirudh Bhattacharyya

Problematics | Who owns the zebra in 2025?

An Einstein puzzle that borrows an iconic character from the original puzzle that's attributed to the great scientist. Try it. It’s less difficult than it looks

Published on Jan 06, 2025 08:11 AM IST

Health Talk | 5 years of Covid-19: Learnings, challenges, successes, and mystery

The Covid-19 pandemic entirely changed how epidemics are managed, development of vaccines and disease surveillance

Looking back, there have been several learnings, challenges, successes, and unresolved mysteries associated with the Covid-19 pandemic (AP)

Updated on Jan 04, 2025 07:19 PM IST

ByRhythma Kaul

Number Theory: Is BJP's poll footprint evolving?

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Updated on Jan 03, 2025 08:12 AM IST

ByNishant Ranjan

Number Theory: In 2024, the Congress gained some and lost some

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Congress leaders Sonia Gandhi, Mallikarjun Kharge and Rahul Gandhi at the AICC headquarters in New Delhi. (Sanjeev Verma/ HT Photo)

Updated on Jan 02, 2025 08:45 AM IST

ByNishant Ranjan, Roshan Kishore

Number Theory: As 2025 begins, a look at India’s demographics

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Updated on Jan 01, 2025 09:13 AM IST

Number Theory: 2024 was a mixed bag for the BJP

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Updated on Dec 31, 2024 09:41 AM IST

ByNishant Ranjan

Problematics | Stolen coins

Five thieves get unequal shares from a set of coins stolen from the museum. Who gets how many coins?

Updated on Dec 30, 2024 11:38 AM IST

Number Theory: Sea surface mercury set for record highs

This is the last of a two-part data journalism series which explains why 2024 is the warmest year for the planet.

For representational purposes only. (HT File)

Updated on Dec 30, 2024 08:48 AM IST

The most spectacular technologies you’ll see in 2025

Technology is rushing towards us and will change our worlds whether we like it or not. Here’s a glimpse of the most exciting technologies we will see in 2025

We’re standing at cusps of technology breakthroughs that’ll change our lives and societies forever and we will need to make sense of it.

Updated on Dec 29, 2024 07:05 PM IST

ByShweta Taneja

Number Theory: Big public donations are just a fraction of political funding

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Supporters of the BJP at an election rally. (AP Photo)(AP)

Updated on Dec 27, 2024 10:56 AM IST

Number Theory: 2024 — The year Earth breached the 1.5°C threshold

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Street artists paint a mural on climate change. (AFP File Photo)

Published on Dec 25, 2024 08:37 AM IST

Number Theory: Celebrating Md Rafi's Bollywood discography

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Legendary singer Mohammed Rafi. (HT File Photo)

Published on Dec 24, 2024 08:00 AM IST