Score high marks in maths in competitive tests and school exams Can you find 12 x 13 x 14 in less than two seconds ? Can you find the HCF of 4441, 4444 and 5005 in less than two seconds ? Help yourself or your kids do maths better. This book will be a wonderful resource. It serves as a companion for all those in upper primary/ high school/college classes and also for those who prepare for competitive examinations.