A canteen starts the shift with 300 meal trays, serves 187, and then restocks with 45 more. How many trays remain?

Correct answer to question 127 (Arithmetic Reasoning): 158 trays

Method

Subtract what was served first, then add the restock. Serving 187 leaves 300 - 187 = 113 trays, and adding 45 more brings the total to 113 + 45 = 158 trays.