1. An example of commonly used Insecticide is

2. Match the following elements with its Latin name:
(a) Lead 1. Stibium
(b) Antimony 2. Plumbum
(c) Tin 3. Kalium
(d) Potassium 4. Stannum
(a) (b) (c) (d)

3. If the focal length of a concave lens is 2m, then the power of the lens is

4. The maximum temperature in a city on 7 days of a certain week was 34.8°C, 38.5°C,
33.4°C, 34.7°C, 35.8°C, 32.8°C, 34.3°C. Find the mean temperature for the week

5. A group of 100 candidates have their average height 163.8 cm with coefficient of variation 3.2. What is the standard deviation of their heights?

6. The present ages of Reena and Usha are 24 years and 36 years respectively what was the ratio between the ages of Usha and Reena, 8 years ago?

7. The total surface area of cube is 384 m2. Find the side of the cube

8. The ratios of the respective heights and the respective radii of two cylinders are 1:2 and 2:1 respectively. Then their respective volumes are in the ratio.

9. At what rate of interest a sum of money doubles itself in 10 years in simple interest?

10. Arrange the following in chronological order with respect to their Chief Ministership in Madras Presidency
1. P.T. Rajan
2. A.Subburayulu Reddiar
3. P. Munusamy Naidu
4. C. Rajaji
5. P. Subbarayan