CAT 2025 Slot 3 · DILR · Question 6

CAT 2025 Slot 3 previous year question on Quant Based Puzzles and Optimisation, with the answer and a step-by-step solution.

Quant Based Puzzles and OptimisationLOGICAL REASONING - High LevelType in the answer (TITA)Medium

Set 2: Travellers and Exchange Rates — this question belongs to a set. Read the full set with all 5 questions →

Aurevia, Brelosia, Cyrenia and Zerathania are four countries with their currencies being Aurels, Brins, Crowns, and Zentars, respectively. The currencies have different exchange values. Crown's currency exchange rate with Zentars = 0.5, i.e., 1 Crown is worth 0.5 Zentars.

Three travelers, Jano, Kira, and Lian set out from Zerathania visiting exactly two of the countries. Each country is visited by exactly two travelers. Each traveler has a unique Flight Cost, which represents the total cost of airfare in traveling to both the countries and back to Zerathania. The Flight Cost of Jano was 4000 Zentars, while that of the other two travelers were 5000 and 6000 Zentars, not necessarily in that order. When visiting a country, a traveler spent either 1000, 2000 or 3000 in the country's local currency. Each traveler had different spends (in the country's local currency) in the two countries he/she visited. Across all the visits, there were exactly two spends of 1000 and exactly one spend of 3000 (in the country's local currency).

The total “Travel Cost” for a traveler is the sum of his/her Flight Cost and the money spent in the countries visited.

The citizens of the four countries with knowledge of these travels made a few observations, with spends measured in their respective local currencies:

i. Aurevia citizen: Jano and Kira visited our country, and their Travel Costs were 3500 and 8000, respectively.

ii. Brelosia citizen: Kira and Lian visited our country, spending 2000 and 3000, respectively. Kira's Travel Cost was 4000.

iii. Cyrenia citizen: Lian visited our country and her Travel Cost was 36000.

How many Zentars did Lian spend in the two countries he visited?

Answer & solution

Answer: 13000

Lian spent 3000 Brins in Brelosia and 2000 Crowns in Cyrenia.

With 1 Brin = 4 Zentars and 1 Crown = 0.5 Zentars: 3000 × 4 + 2000 × 0.5 = 12000 + 1000 = 13000 Zentars.

Check: Flight 5000 + 13000 = 18000 Zentars = 36000 Crowns, as stated.

Shortcut: Lian's Travel Cost is 18000 Z and her flight 5000 Z, so her spends are 13000 Z.

Hence, the answer is 13000.

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