Alert: You are not allowed to copy content or view source
Check Exam Dates here | See Marking Scheme here | Frequently Asked Questions (FAQs) | Buy Practice Papers for CREST Olympiads here | Last Date for CREST Reasoning Olympiads (CRO) Registration is 20th June 2019 | CREST Reasoning Olympiads (CRO) is scheduled for June/July. Apply now


A number that can't be simplified to remove a square root (or cube root etc). Examples: ? _2 (square root of 2) can't be simplified further so it is a surd ? _4 (square root of 4) CAN be simplified to 2, so it is NOT a surd