NRICH: Find the Factor

Find a factor of 248−1.

248−1 is divisible by two whole numbers between 60 and 70. Find the smaller of these.

This problem is taken from the World Mathematics Championships

You can find more short problems, arranged by curriculum topic, in our short problems collection.

Age 14 to 16

Math Topics Resource Audience

Algebra & Pre-Algebra, Quadratic Equations

High School

RELATED LISTINGS

NRICH

NRICH (University of Cambridge)

NRICH provides thousands of free online mathematics resources for ages 3 to 18, covering all stages of early years, primary and secondary school education – completely free and available to all.

NRICH: Topics in Secondary Mathematics

NRICH (University of Cambridge)

Do you enjoy thought-provoking questions? If so, this is the place for you.

NRICH: Short problems for Starters, Homework and Assessment

NRICH (University of Cambridge)

The links below take you to a selection of short problems based on UKMT junior and intermediate mathematical challenge questions.

What are you looking for?

Organization

NRICH (University of Cambridge)

Website URL

https://nrich.maths.org/13753

Type of Resource

Challenge

Assigned Categories

Math - Algebra
Math

K-12 Categories

Advanced Search

Submit a Resource

What are you looking for?

Organization

Website URL

Type of Resource

Assigned Categories

About SciTech Institute

SITE MENU

CONTACT US