Editors Pick

Updated on Feb 10, 2025 08:31 AM IST

Which one(s) among Superman, Batman and Robin tell(s) the truth, and which one(s) lie?

Number Theory: Three key takeaways from the Capital verdict

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Prime Minister Narendra Modi at the BJP HQ after the party won the Delhi assembly election on Saturday.(PTI)

Updated on Feb 09, 2025 08:38 AM IST

ByRoshan Kishore, Nishant Ranjan

Number Theory: Four things which will decide Delhi results

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Will the Aam Aadmi Party (AAP) come to power for the third consecutive time in the Union territory, or will the BJP dislodge AAP?(HT Photo/Sanjeev Verma)

Updated on Feb 07, 2025 06:45 PM IST

ByAbhishek Jha, Roshan Kishore, New Delhi

Number Theory: After Delhi, Bihar next in India's diverse poll arena

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Prime Minister Narendra Modi with Bihar chief minister Nitish Kumar (left).(ANI)

Updated on Feb 06, 2025 08:33 AM IST

Number Theory: The Indian economy — Equality, sentiment and growth realities

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Published on Feb 04, 2025 08:23 AM IST

Problematics | Dinner with Oscar non-winners

Here’s an Einstein puzzle that celebrates Alfred Hitchcock, Charlie Chaplin, Marilyn Monroe among 15 legends who never won an Oscar during their lifetimes.

Published on Feb 03, 2025 04:05 PM IST

Number Theory: The rise and rise of India’s income tax collections

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Published on Feb 03, 2025 09:27 AM IST

ByRoshan Kishore, Auhona Mukherjee

Number Theory: Three things to watch out for in today's Budget

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Union finance minister Nirmala Sitharaman with MoS Pankaj Chaudhary and the full budget 2025-26 team in New Delhi on Friday.(PTI)

Updated on Feb 01, 2025 09:01 AM IST

ByRoshan Kishore, Auhona Mukherjee

Number Theory: The state of the markets before the Budget

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Finance minister Nirmala Sitharaman at the halwa ceremony to mark the commencement of the final stage of preparations for Interim Union Budget 2024 in New Delhi on January 24. (PTI)

Updated on Jan 31, 2025 10:51 AM IST

Number Theory: Three charts that put Budget 2025-26 in perspective

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Union finance minister Nirmala Sitharaman carrying the Budget tablet wrapped in a traditional 'Bahi Khata' style pouch in Parliament.( (ANI Photo))

Published on Jan 30, 2025 08:33 AM IST

Number Theory: Can the GPU-neocloud party go on forever?

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Updated on Jan 29, 2025 08:28 AM IST

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

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

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

ByAbhishek Jha

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

ByAbhishek Jha

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

ByAbhishek Jha

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)