By using the numbers 1, 1,1, 5 and 6 only once but need to use all and using any math get the number 51

To get the number 51 using the numbers 1, 1, 1, 5, and 6 only once and using any basic math operations, you can follow these steps:

1. Start with the number 6.
2. Subtract the number 5 from 6: 6 - 5 = 1.
3. Now, you have two 1s left and need to make 50 using them.
4. Multiply the two 1s together: 1 x 1 = 1.
5. Add the result to 50: 1 + 50 = 51.

So, by subtracting 5 from 6 and then adding 1 to 50, you can use the numbers 1, 1, 1, 5, and 6 only once and using any basic math operations to get the number 51.