The prime minister's idea for all pupils in England to study some form of maths up until the age of 18 would be challenging to implement, experts say.
A panel of specialists told the Education select committee they broadly support the "worthy ambition".
However, a lack of maths teachers and a focus on exams meant "fundamental reform" would be needed, they said.
It comes after Rishi Sunak said the UK must "reimagine our approach to numeracy".
Last month, Mr Sunak said "in a world where data is everywhere and statistics underpin every job, letting our children out into that world without those skills is letting our children down".
