Straits Times (Paid Subscription required for some articles)
2022, July 15: Challenging questions in PSLE capped at 15% each year
Schoolbag - The Education News Site
2022, July 15: Does Maths have to be so difficult?
Channel 8 News
2022, July 15: 小学离校考试太难？教育部：每年“难题”最多占15%
Challenging Questions in PSLE (Channel 8 news)