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48.	12, 34, 10, 11, 12, 5, 6 ,7, 13, 14, ?, ? Logically, what two numbers should replace the question marks?

Answer

15 and 11 1 + 2 + 3 + 4 = 10, then insert next two numbers 11, 12 and add digits 1 + 1 + 1 + 2 = 5. Insert next two numbers 6, 7 and add digits 6 + 7 = 13. Insert next two numbers 14, 15 and add digits 1 + 4 + 1 + 5 = 11.

49.	My watch was correct at noon, after which it started to lose 17 minutes per hour until six hours ago it stopped completely. It now shows the time as 2.52 pm. What time is it now?

Answer

10 pm. 12 noon = 12 noon, 1 pm = 12.43, 2 pm = 1.26, 3 pm = 2.09, 4 pm = 2.52,+6 hours = 10 pm.

50.	A green grocer received a boxful of tomatoes and on opening the box found that several had gone bad. He then counted them up so that he could make a formal complaint and found that 68 were mouldy, which was 16 per cent of the total contents of the box. How many tomatoes were in the box?

Answer

425. (68 ÷ 16) × 100;