Welcome to your 08 math

1. 
A piece of string is 36 cm long. What will be the length of each side. If the string is used to form an equilateral triangle?
2. 
The marked price of an article is ₹80 and it is sold at ₹76, then the discount rate is
3. 
2.5% of Rs. 200
4. 
The smallest number by which 3456 must be multiplied so that the product will be a perfect cube.
5. 
A jacket was sold for ₹1,120 after allowing a discount of 20%. The marked price of the jacket is
6. 
Which number is cube of even natural numbers:
7. 
Find the smallest number by which 9720 should be multipled to get a perfect cube.
8. 
If the sides of a parallelogram are increased to twice its original lengths, how much will the perimeter of the new parallelogram increase?
9. 
Three cubes of metal whose edges are 6 cm, 8 cm and 10 cm respectively, are melted to form a single cube. The edge of the new cube is
10. 
The cube of a number x is 16 times of x then find x ______________
11. 
If marked price of an article is Rs 1,200 and the discount is 12% then the selling price of the article is
12. 
There is a circular pond and a footpath runs along its boundary. A person walks around it, exactly once keeping close to the edge. If his step is 44 cm long and he takes exactly 400 steps to go around the pond, then find the diameter of the pond.
13. 
Find the value of
14. 
15. 
A student multiplied a number by 2/5 instead of 5/2. What is the percentage error in the calculation?
16. 
A wire is bent to form a square of side 22 cm. If the wire is rebent to form a circle, what will be its circumference?
17. 
The one’s digit of the cube of 23 is
18. 
For calculation of interest compounded half yearly, keeping the principal same, which one of the following is true
19. 
Ragini’s income is 25% more than Rohin. How much percent is Rohin’s income less than Ragini?
20. 
√31684 = ?