Equation: HE + SEES + THE = LIGHT. Each of the 7 unique letters (E, G, H, I, L, S, T) represents a different digit. Leading letters (H, S, T, L) cannot be zero.

H=5, E=4, S=9, T=7, L=1, I=0, G=2 → 54 + 9449 + 754 = 10257

HE + SEES + THE = LIGHT

What is this puzzle?

Solve the addition alphametic puzzle where HE + SEES + THE = LIGHT. Each letter represents a unique digit from 0-9. No number starts with zero.

Difficulty: medium · Category: addition · Unique letters: 7

This medium-level addition alphametic puzzle features 7 unique letters (E, G, H, I, L, S, T). In the equation HE + SEES + THE = LIGHT, each letter maps to a distinct digit from 0 to 9. With only 7 of 10 digits used, 3 digits remain unused in the solution. The leading letters H and S and T and L cannot represent zero — this is your first constraint. This puzzle has 3 addends (HE + SEES + THE), making carry analysis more complex. Start from the rightmost column and work left, tracking carries between columns.

This addition alphametic has 7 unique letters to determine.
Leading letters: H, S, T, L. None of these can be zero.
There are 7 unique letters, so 3 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.