Alert: You are not allowed to copy content or view source
IMO Result Declared Check here | IMO Level 2 Exam Timing & Guidelines Check here | Register for Maths, Science, English, GK Olympiad Exam Click 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


In Algebra "Substitution" means putting numbers where the letters are. Example: What is x + x/2 when x=5? Put "5" where "x" is: 5 + 5/2 = 5 + 2.5 = 7.5