1.

If a clock strikes once at 12 A.M., twice at 1 A.M., thrice at 2 A.M. and so on, how many times will the clock be struck in the course of 3 days? (Assume a 24 hour clock) (a) 756 (b) 828 (c) 678 (d) 1288 

Answer»

Correct option (b) 828

Explanation:

In a period of 1 day or 24 hours the clock would strike 1 + 2 + 3 + ….+ 23 = 276 times. 

In the course of 3 days the clock would strike 276 × 3 = 828 times.  



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