Our editorial team delivers the guide for "Brain Test 2 Quest for Brainiac: Level 13, They must open that door.".
Question
They must open that door.
Hint 1
Look at the colors around the door carefully.
Images
Answer
Pick the gems on the ground and put them in the empty spots above the door in this order from left to right: Blue, blue, yellow and green. Now tap on the door.
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