1. What is the area of a triangle with sides 6cm, 8cm and 10cm?

2. If a business man makes a profit of 20% on the selling price then this profit percentage on the cost price will be:

3. What is the value of y in 3ʸ⁺¹-3ʸ=54

4. If a+b +c=15 and ab + bc + ca=75, what is the value of a²+b²+c?

5. What is the minimum value of n(A∪B) if n(A)=12 and n(B)=8?

6. What will be the volume of pyramid whose base is square of side 9cm and height is 10cm?

7. What is the value of x- 1/x if x²+ 1/x²=27?

8. Present population of a town is 2,00,000. What will be the population of the town after 2 years if the annual growth rate is 10%.

9. If a+b/a-b = a-b/a+b then the value of (ab)⁴ will be:

10. What is the H.C.F. of 2x³-16, x³-4x+4 & x²-3x+2.

11. Find arithmetic mean of 85,92,85,79,68,73 & 86.

12. If a work is completed by 20 people in 3 days then how many people are required to complete the work in 2 days?

13. If Radhesh sold a refrigerator with 20% profit at Rs.12000 then how much was its cost price?

14. In how many years a sum of Rs2,000 amount to Rs.2,600 at 6% simple interest rate?  

15. If a²=b+c, b²=a+c & c²=a+b then find the value of 1/b+1 + 1/b+1 + 1/c+1

16. What is the H.C.F. of x²-y² and x³-y³?

17. A pole on the bank of a river is observed from the opposite bank and the angle of elevation is found to be 60°. If the breadth of the river is 20√3 ., what is the height of the pole?

18. Find two numbers whose sum is 10 and difference is 2