Variable Vault – Level 1 – Hard

Other Puzzles

Chain Reaction – Level 1 – Easy

Chain Reaction – Level 1 – Easy

Chain Reaction – Level 1 – Hard

Chain Reaction – Level 1 – Hard

Chain Reaction – Level 1 – Medium

Chain Reaction – Level 1 – Medium

Chain Reaction – Level 1 – Easy

Chain Reaction – Level 1 – Hard

Chain Reaction – Level 1 – Medium

Chain Reaction – Level 1 – Medium

Chain Reaction – Level 1 – Medium

Chain Reaction – Level 1 – Medium

Chain Reaction – Level 1 – Medium

Chain Reaction – Level 1 – Medium

Chain Reaction – Level 1 – Medium

Code Breaker – Level 1 – Easy

Code Breaker – Level 1 – Easy

Code Breaker – Level 1 – Hard

Code Breaker – Level 1 – Hard

Code Breaker – Level 1 – Medium

Home » Variable Vault – Level 1 – Hard

Four lettered dials (A, B, C, D) unlock a vault. Each dial must be set to the correct number based on the clues below. Solve all clues to find the code: the 4-digit number ABCD.

Read more about how to solve these puzzles here

Clues:

The difference between A and B is 5 less than D.
C is equal to (A + B) ÷ 2.
A = B + 2
A + B + C + D = 22
D is an odd number greater than 5.
B = 10 – A

Your Workings For Variable Vault

Enter Code:

Reveal the Answer

Additional instructions for Variable Vault (Level 1, Hard)

Variable Vault – Hard

Proof-style finish:

Re-check each solved equation by substitution.
Ensure simplified expressions truly cannot be reduced further.
Confirm extracted coefficients/constants are correct.

If the vault doesn’t “open”: the error is usually a small algebra slip earlier in the chain.

Full help: Variable Vault

You must be logged in to view this answer.