Dadar - Usually Mathematics is considered as a subject which gives goosebumps to many. But students of Usimas prove otherwise .These students ,aged 4 years to 11 years solve maths problems just by listening and by counting on their fingertips .These students solve 200 sums within 8 minutes . 632 students participated in the test by Usimas on Sunday at Sharadashram Visten academy , Dadar. Usimas was founded in 1993.