lesson Write a review lesson Write a review beta EdBrAIn It EdBrAIn uses AI to customize lesson resources for your students’ needs. What Number? - Numeracy Problem Share Share On Facebook Share On Twitter Share On Pinterest Share On LinkedIn Share On Microsoft Teams Email Copy link Share Share On Facebook Share On Twitter Share On Pinterest Share On LinkedIn Share On Microsoft Teams Email Copy link nrich maths Subject Math — Counting and Cardinality, Operations and Algebraic Thinking Grade Level Grades K-2 License About Resources Reviews Related About This Lesson I am less than 25. My ones digit is twice my tens digit. My digits add up to an even number. Resources External resources http://nrich.maths.org/public/viewer.php?obj_id=984 Website Reviews Be the first to submit a review! Advertisement More from this Contributor Lesson Math Story Time Activity • Grades K-2 nrich maths Lesson Making Caterpillars Activity • Grades K-2 nrich maths Lesson Baskets Activity • Grades K-2 nrich maths Lesson Got a strategy for the last biscuit? Grades 3-12 nrich maths Lesson Efficient stage Activity • Grades 6-8 nrich maths Lesson Finding fifteen Activity • Grades K-5 nrich maths