Welcome to your 08 math

1. 
Latika bought a teapot for ₹120 and a set of cups for ₹400. She sold teapot at a profit of 5% and cups at a loss of 5%. The amount received by her is
2. 
A shopkeeper buys 10 eggs @ ₹ 8 and sells at 8 eggs @₹ 10. Find his gain or loss percent.
3. 
Cube of a natural number whose unit digit is 8, ends with digit -__________
4. 
How many coins 1.4 cm in diameter and 0.4 cm thick is to be melted to form, right circular cylinder of height 16 cm and diameter 3.5 cm
5. 
Shyama purchases a scooter costing ₹36,450 and the rate of sales tax is 9%, then the total amount paid by her is
6. 
If the sides of a rectangle are increased to twice its original lengths, how much will the perimeter of the new rectangle increase?
7. 
What is the radius of the largest circle that can be cut-out of the rectangle measuring 12 cm in length and 10 cm in breadth?
8. 
A room is 4.5 m long and 4 m wide. The floor of the room is to be covered with tiles of size 18 cm by 10 cm. Find the cost of covering the floor with tiles at the rate of ₹ 4.50 per tile.
9. 
Find the area of a square park whose perimeter is 440 m, Also find the cost of growing grass on it at the rate of ₹ 2.15 per sq. m?
10. 
The hypotenuse of a right triangle with its legs of lengths 3x × 4x is
11. 
Find the area of a square field, if its perimeter is 256 m.
12. 
The volume of a cylinder whose radius r is equal to its height is
13. 
Which among 43², 67², 52², 59² would end with digit 1?
14. 
If radius of a circle is increased to twice its original length, how much will the area of the circle increase?
15. 
A cube of side 5 cm is painted on all its faces. If it is sliced into 1 cubic centimetre cubes, how many 1 cubic centimetre cubes will have exactly one of their faces painted?
16. 
Find the smallest number by which 9720 should be divided to get a perfect cube.
17. 
There is 60% increase in an amount in 6 years at simple interest. What will be the compound interest of Rs. 15000 after 3 years at the same rate.
18. 
Cube root of 27² is _____
19. 
The next two numbers in the number pattern 1, 4, 9, 16, 25 ... are
20. 
A student multiplied a number by 2/5 instead of 5/2. What is the percentage error in the calculation?