Create a number tree - combine your numbers into a binary sum tree, pairing neighbours and adding upward until one root remains. Watch the branch-and-merge structure grow. Batch up to 1000 trees. Copy or download. Runs in your browser. Free.
Combine a list of numbers and they stitch themselves into a tree: each pair merges upward, generation by generation, until a single root stands. 2+3=5, 5+1=6, then 5+6=11 - the combined total climbs a real branch-and-merge ladder you can see.
Create a Number Tree turns a flat list into a branching diagram. Merge neighbours by sum to build a clean pyramid, or merge the smallest first for a compression-style Huffman tree. Up to 1000 lists per run, each drawn as a labelled text-art tree.
1. 2 3 5 1 9: sum mode pairs (2+3)=5 and (5+1)=6 and (6+9)=15, then (5+6)=11, root (11+15)=26 - the total.
2. 5 1 2 2 1: minimum mode always pairs the smallest two - a tight, balanced Huffman-style tree.
3. 1 1 1 1 1 1: every merge sums to 2, branching into a regular balanced bush.
4. 10 20 30: neighbours merge 10+20=30 then 30+30=60 - a small three-leaf tree.
5. 7 8: the simplest tree - two leaves merge straight to root 15.