Inter House Mental Math Quiz was conducted online for all grades . Mental Math is an ability to calculate and get a correct answer without using pencil & paper or any other electronic devices. Research has shown that in daily life at least 75% of all calculations are done mentally by adults. To enhance calculation mental maths worksheets were also allotted to students of grade 1 to 10th Which they had completed within time limit . Many people often assume that learning mental arithmetic is merely a method to improve the speed and accuracy of calculations, but it also develops mental abilities like concentration, observation, visualization & imagination, and memory. An ‘Inter House Mental Math Quiz’ was conducted on July 13, 2021for Classes 1stto 10thassessed the mathematical skills of the students with a varying degree of difficulty. The rounds for the Quiz were related to – Number patterns,