Interview Maths Puzzle Numerical Ability

A rectangular room measures 7.5 meters in length and 3 meters in width. The room has a height of 3 meters. A spider sits 25 centimeters down from the ceiling at the middle of one of the short walls. A sleeping fly sits 25 centimeters up from the floor at the middle of the opposite wall. The spider wants to walk (i.e., move along the walls, floor, and ceiling only) to the fly to catch it. How can the spider reach the fly, walking just 10 meters? Is it even possible?

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Interview Other Question

I have a box of one hour fuses. If I set one end of a fuse on fire, I know that the fuse will burn all the way to the other end in EXACTLY one hour. However, the fuses may burn unevenly [ie - it may take 59 minutes to burn the first half of a fuse, but only 1 minute to burn the other half]. Furthermore, all of the fuses may burn unevenly at a different rate. The only thing we know for sure is that each one takes 1 HOUR to burn completely. The Question: Given 2 of these fuses and a lighter, how can I time out 45 minutes precisely?
Father’s age is 5 times his son's age. 4 years back the father was 9 times older than son. Find the fathers' present age.

(a) 45 Years (b) 40 Years (c) 50 Years (d) 35 Years



A shopkeeper bought a watch for Rs.400 and sold it for Rs.500.What is his profit percentage?

(a) 100% (b) 20% (c) 25% (d) 10%


A number 54 is divided into two parts, so that 10 times the first and 22 times second are together equal to 780. The difference of the parts is:

(a) 12 (b) 14 (c) 20 (d) 34

In simple interest what sum amounts of Rs.1120/- in 4 years and Rs.1200/- in 5 years ?
(a) Rs. 500 (b) Rs. 600 (c) Rs. 800 (d) Rs. 900