LOGIC PUZZLE

Dr Singh and Professor Roberts have samples of rock from five different celestial bodies which were collected over a number of years. The samples vary in weight, and have been chemically analysed for the presence of trace metals.

‘The sample from the Moon was obtained in the 20th Century and is the heaviest of them all,’ said Dr Singh.

‘The sample containing nickel is three times as heavy as the sample from Mars. Neither of these specimens were obtained in 2001,’ added Professor Roberts.

‘After some careful analysis, I detected traces of gold in the asteroid sample, which was collected exactly ten years after the 12kg sample,’ reported Dr Singh.

‘That’s a fascinating result. Did you know the sample containing iron, which is not from Mercury, was found within the last decade and weighs 3kg less than the sample found in 1984?’ asked Professor Roberts.

‘That makes sense. By my measurements the sample containing silver weighs more than the sample containing aluminium,’ replied Dr Singh.

Based on their discussion, the scientists were able to log the weight and year of discovery for each sample of space rock and determine which trace metal was detected in each. Can you figure out their results?