Register for Maths, Science, English, Reasoning Olympiad Exams Register here | Book Free Demo for Live Olympiad Classes here | Check Olympiad Exam Dates here | Buy Practice Papers for IMO, IOM, HEO, IOEL etc here | Login here to participate in all India free mock test on every Saturday

Tally Mark

A way of keeping count by drawing marks. Every fifth mark is drawn across the previous 4 marks, so you can easily see groups of 5