1. If the area of equilateral triangle is 16√3 cm square on, find its perimeter.

2. The sum of two numbers is 40 and one is four times the other. Find the numbers.

3. 3 children are born in a family. What is the probability of having exactly two sons.

4. What is the additive inverse of ×?

5. The sum and difference of two numbers are 20 and 6 respectively. Find the number.

6. The solution of the equations 7x-2y=5 and x+3y=4 is

7. A pole has 1/4 of its length in the mud, 1/3 of the remaining portion in the water and 3 metres above water. What is its Length?

8. The curved surface area of a cylinder is 44cm² with 7cm high. Calculate the radius.

9. Simplify: 14/15÷(1/3 – 1/5)-5

10. What length of carpet of width 1.5m will be required to cover the floor a room of length 6m and breadth 4m?

11. If Σfx=5000 and number of terms N=40. Find mean (x).

12. A card is drawn from a pack of 52 cards. Find the probability that the card drawn is a diamond.

13. If 2-x≥x-2 then the solution of x is

14. What is the additive identity of 5?

15. Solve:3*+7 ≥ 10

16. A natural number is chosen at a random from the first 100 natural number. What is the probability that the number so chosen is exactly divided by 5?

17. Simplify: 2.5*2.5-1.1*1.1/2.5-1.1

18. Find the area of the annulus having the inner radius 7cm and outer radius 14cm.

19. The sides of a triangle are in the ratio 5:4:3 and its area is 54cm². Find the perimeter of the triangle.

20. If a prism is 15cm high with its base a triangle having sides 6cm, 8cm and 10cm. Find its volume.

21. If (x)=50 and Σfx=750. Find the number of terms (N).

22. What is the multiplicative identity of 8?

23. A coin is tossed three times what is the probability of getting exacetly two heads?

24. If the radius of a sphere is 7cm. What is its volume?

25. Find the total surface area of a prism of which the length is 12cm and the base is a square of a side 6cm.