For the following questions answer them individually
If $$(10.24 \times 10.24) - (10.24 \times A) + (0.24 \times 0.24)$$ is a perfect square, then find the value of 'A'.
Ravi travelled 4 km straight towards south. He then turned left and travelled 6 km straight; he again turned right and travelled 4 km straight. How far is he from the starting point?
The sum of the digits of a two-digit number is 15 and the difference between the digits is 3. What is the two-digit number?
In the given figure, the circle represents graduate, triangle represents working people, and square represents post graduate. Which region represents graduate andpost graduate but not working people?