Sadisha Maths Talent Test Notifications, Practice papers and Results

1) A teacher asked a student to calculate the average of 4 numbers. The student wrongly hears +6 as -6, and calculates the average of 4.5. What should have been the correct average?

2) If a pulley with a diameter of 35cm is used to get water from a well of depth 33 meters, how many number of rotations of the pulley is required to get the water from the well?

3) What is the sum of the following series? 1 + 7 + 17 + ... + 511(nth term is 2 * n^2 -1 )

4) What is the 5 th prime number ? (2 is the 1st prime, 3 is the 2nd and so on)