Q1. If one and only one edge of a tetrahedron is greater than 1, then its volume is a. ≤ 1/8 b. ≤ 1/16 c.≥ 1/8 d.≥ 1/16

Q2. Find all integers n such that S(n) = S(2n) = ... = S(n*n), where S is the sum of the base-10 digits.

Q3. A fly sits on the corner of a wooden cube. What is the shortest distance it must travel in order to reach the opposite corner of the cube?

Q4. Find the integer N such that N and N2 together contain all 10 digits from 0 through 9 twice each, and also have the largest number of double digits (such as 11 or 66).

Answer the questions based on the following table and pie chart. The table defines the costs (Rs. In crores) of five airline companies from 1999 to 2001 and the pie charts define the costs (in percentage) in different categories of five airlines companies in 1999 and 2001.

Q1. Which company has shown the highest percentage increase in costs in 2001 over 2002? a. Air India b. Indian Airlines c. Jet Airways d. Air Shara