Equation: TIS + SAD + TITUS = CALLS. Each of the 8 unique letters (A, C, D, I, L, S, T, U) represents a different digit. Leading letters (T, S, C) cannot be zero.

T=6, I=8, S=9, A=0, D=1, U=3, C=7, L=2 → 689 + 901 + 68639 = 70229

TIS + SAD + TITUS = CALLS

What is this puzzle?

Solve the addition alphametic puzzle where TIS + SAD + TITUS = CALLS. Each letter represents a unique digit from 0-9. No number starts with zero.

Difficulty: medium · Category: addition · Unique letters: 8

This medium-level addition alphametic puzzle features 8 unique letters (A, C, D, I, L, S, T, U). In the equation TIS + SAD + TITUS = CALLS, each letter maps to a distinct digit from 0 to 9. With only 8 of 10 digits used, 2 digits remain unused in the solution. The leading letters T and S and C cannot represent zero — this is your first constraint. This puzzle has 3 addends (TIS + SAD + TITUS), making carry analysis more complex. Start from the rightmost column and work left, tracking carries between columns.

This addition alphametic has 8 unique letters to determine.
Leading letters: T, S, C. None of these can be zero.
There are 8 unique letters, so 2 digits from 0–9 will not be used.
Start from the rightmost column (units place) and work left, tracking carries between columns.
With three addends, each column can produce a carry of at most 2.
A moderate number of letters means you'll need logical deduction alongside trial and error.