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Turkey is in mourning after a deadly school shooting in the southern province of Kahramanmaras left nine people dead, including eight students and a teacher. The attacker, identified as 14-year-old Isa Aras Mersinli, opened fire on two classrooms at the Ayser Calik School on Wednesday before being found dead.Funerals were held on Thursday for the victims, including maths teacher Ayla Kara, 55. A 10th victim died while being treated in hospital on Thursday, and six of those wounded in the attack were in critical condition.The interior minister, Mustafa Ciftci, said the attacker is believed to have used guns that belonged to his father, a former police officer. The attack was the country's second school shooting in two days, following an attack on Tuesday at a high school in Sanliurfa province that wounded 16 people.At a funeral for four of the victims held near Kahramanmaras city's main mosque on Thursday, one father sat motionless beside the coffin of his daughter, 10-year-old Zeynep. "Our grief is endless. These children were like our own. They were all innocent," said Vezir Yucel, father of a student named Yusuf, who lost his close friend, 10-year-old Bayram, in the shooting.The interior and education ministries held a joint school security meeting in the capital, Ankara, on Thursday, which was attended by both ministers and all 81 of Turkey's provincial governors, as well as police chiefs and provincial education directors. Dozens of students were arrested on Thursday over alleged social media posts implying they might stage similar attacks.Justice Minister Akin Gurlek announced that 67 social media users were detained over posts targeting 54 different schools. The incident has raised concerns about school safety and the rise of gun violence in Turkey.

The UK government's ambitious plans to create 400,000 green jobs by 2030 seem to be failing to deliver for young people in England's coastal communities. Despite being surrounded by offshore windfarms, 44% of the UK's offshore windfarms are located in the east of England, areas like Lowestoft and Great Yarmouth are struggling with high unemployment and limited job opportunities.Jake Snell, a 19-year-old from Lowestoft, is a prime example. With high grades in maths and physics A-levels, a distinction in BTEC engineering, and work experience at an engineering company, he seemed like the perfect candidate for a role in the green energy sector. However, out of his 14-person cohort, only two people ended up with apprenticeships, and only one of these was in engineering.Rachel Wilde, a social anthropologist at University College London, notes that the term 'green jobs' is nebulous and that there is little concrete evidence of what these jobs actually are. She argues that there is a gap between politicians and policymakers promoting green jobs and people on the ground trying to talk to young people about job opportunities.Avril Keating, a professor of youth studies at UCL, suggests that the focus on high-profile roles in green energy is misleading and that more investment in continuing careers support for people in coastal and economically deprived areas is urgently needed.The government has announced plans to establish five technical excellence colleges that will focus training around the green energy sector, which could provide hope for the next generation of young people in these areas. However, for now, many young people like Snell are struggling to find employment and are feeling frustrated and disillusioned with the lack of opportunities.

Tanya Khovanova has long been a leading voice in the world of recreational mathematics, authoring a popular blog and running the Number Gossip site where enthusiasts can inquire about any number.She now debuts her first book, Mathematical Puzzles and Curiosities, co‑written with fellow puzzle‑enthusiasts Ivo David and Yogev Shpilman. Published by World Scientific, the volume offers fresh challenges and inventive twists on classic problems.To give readers a taste, Khovanova selected three puzzles for the Guardian column:1. Battleships – As a naval admiral you must choose between sending a single vessel with a success probability of P % or two vessels each with a P/2 % chance, where the mission succeeds if at least one ship does. Which strategy maximises the odds?2. The Two Oracles – You face two respondents, Randie, who answers randomly, and Rando, who randomly decides to tell the truth or lie before each answer. Is there a method to distinguish them?3. Bad Maths – A student computes 5548 − 5489 as 59, claiming the “548” cancels out. He then experiments with a subtraction of the form XXYZ − XYZW (distinct digits) and observes the result is XW. How many digits in the new expression match those in the original calculation?Solutions to the trio were later posted online (update), but readers were urged to avoid spoilers until the scheduled reveal.Khovanova also reminds fans that she has been curating puzzles for the Guardian every other Monday since 2015 and welcomes new submissions via email.

The UK’s chancellor, Rachel Reeves, is set to sit down with the chief executives of Sainsbury’s, Tesco and Morrisons on Wednesday. The meeting aims to gauge the scale of possible price hikes and shortages of essential household goods as the nation grapples with a sharp rise in energy, fuel and fertiliser costs triggered by the ongoing Middle East conflict. A Treasury source described the gathering as a "fact‑finding, open discussion" intended to identify any supply squeezes and to forecast the impact on the cost of living over the coming months. Allan Leighton, executive chair of Asda, will not attend but has publicly urged the government to "stand up and start doing stuff" to aid farmers and curb fuel prices, warning that food costs will inevitably climb if the conflict persists. Simon Roberts, chief executive of Sainsbury’s, cautioned that price increases are "unlikely to rise until the summer" thanks to long‑term contracts on energy and fertiliser that currently keep a lid on costs. Nevertheless, UK growers are sounding the alarm. Producers of tomatoes, cucumbers, peppers and aubergines say higher input costs could force them to pull plants from the ground, creating potential gaps on supermarket shelves. Lee Stiles, secretary of the Lea Valley Growers’ Association – the region often dubbed London’s "salad bowl" – is lobbying for indoor food producers to be classified as "energy‑intensive users" alongside steel, chemicals, cement and glass, thereby qualifying for additional support with surging energy bills. Stiles also called on retailers to renegotiate contracts with growers to reflect the cost surge since the Middle East conflict began. He warned that the upcoming increase in standing charges on 1 April – a fixed daily fee for accessing the gas and electricity network – will further strain producers’ margins. "Growers have already invested in plants and labour for three to four months," Stiles said. "When you do the maths, the numbers don’t add up. They would lose less money by sending workers home, pulling the plants out and turning off the boiler." If domestic growers cut the season short, European glasshouses, which normally supply the UK’s salad market at this time of year, may struggle to fill the void, risking a repeat of the fresh‑produce shortages experienced in early 2023. The British Poultry Council (BPC) echoed these concerns, highlighting pressures on supplies of oil, gas, fertiliser and essential feed components. "These factors are creating sustained upward pressure on the cost of poultry production," the BPC warned, adding that while some cost increases may be absorbed, others will inevitably be passed on to consumers. Richard Griffiths, BPC chief executive, noted that while many farmers have long‑term energy deals, costs such as diesel are rising rapidly, and there are fears that vital medicines could become unavailable at any price. In response, the government has announced a £117 cut to household energy bills, an increase to the legal minimum wage, and the launch of a £1 billion "crisis and resilience" fund aimed at helping vulnerable households with expenses such as heating oil.