In the next sum, the digits have been replaced by letters so that each different letter represents a different number. If we know that S E I S is divisible by 6,

**What is the digit by which each letter has to be replaced so that the sum is correct?**

S | AND | I | S | ||

D | AND | ||||

+ | AND | N | AND | R | OR |

R | AND | Y | AND | S |

#### Solution

The solution is the next:

4 | 1 | 0 | 4 | ||

8 | 1 | ||||

+ | 1 | 7 | 1 | 2 | 9 |

2 | 1 | 3 | 1 | 4 |