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

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

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

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

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

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

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

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

9. 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?

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

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

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

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

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

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

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

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

18. 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%.