I found this worksheet below via Twinkl (please review link)

https://www.twinkl.com.au/resource/t-n-45438-place-value-code-breaking-activity-sheets

The worksheet is best suited to early primary, or students at an early primary level. It builds knowledge learnt via the binary systems (0-9). Allows students to crack the code, and find the solutions. Each shape represent a number, that they must switch into each question to get the answer.