What is 1 over 2 over 6?

To simplify the expression 1 over 2 over 6, you first need to rewrite it as a division problem: 1 ÷ (2 ÷ 6). To solve this, you can rewrite it as 1 ÷ 2 x 6, which simplifies to 1 ÷ 2 x 6 = 1 ÷ 2 = 0.5. Therefore, 1 over 2 over 6 is equal to 0.5.