“1 to 6 Number Puzzle” has been added to your cart. Continue shopping Product Price Quantity Subtotal ∑n2 = n(n+1)(2n+1)/6 ₹420.00 ∑n2 = n(n+1)(2n+1)/6 quantity ₹420.00 1 to 6 Number Puzzle ₹180.00 1 to 6 Number Puzzle quantity ₹180.00 Coupon: Cart Totals Subtotal ₹600.00 9% CGST ₹37.80 9% SGST ₹37.80 2.5% CGST ₹4.50 2.5% SGST ₹4.50 Total ₹685.00 Continue Shopping Checkout