Sixteen-year-old Hrishikesh Tiwari from Kashipur, Uttarakhand, is in love with numbers! The tricky formulae, fun equations, and mind-boggling puzzles...
Sixteen-year-old Hrishikesh Tiwari from Kashipur, Uttarakhand, is in love with numbers! The tricky formulae, fun equations, and mind-boggling puzzles...