IMPORTANT MATH QUESTION (CLASS - 8)

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1.      (a) Write the expended form of – 500                                                            
      (b) write the number in original form 7×100+8×10+5×1
2.     Find the cubes of 1/2 and -1/2  and
3.     Is 400 is perfect cube? Show that.
4.     What is the sum of square of first five whole numbers?
5.     What is the sum of cube of first three natural number?
6.     Which smallest number be added to 1234 to make it perfect square?
7.     Which smallest number multiplied 1234 to make it perfect square?
8.     Find the square root of 625 by prime factorization method?
9.     Find the square root of 625 by division method?
10.   if cost price is 100 and sell price is 105 find profit percent?
11.   Find the greatest 4 digit number which is perfect square.
12.   Write the square of all natural number between 9 to 12 
13.   Arrange in ascending order 2/3 , 3/4  , 4/5 , 5/6
14.   If the shopkeeper give the two successive discount 10% and 20% find total discount
15.   If the cost of book is 500 if shopkeeper increases the price of book by 20% find the new price of book?
16.   Find the simple interests on 500 at rate of 20% per annum in 6 months?
17.   If 90% of x is 315 km, then the value of x is
18.   Shyama purchases a scooter costing Rs 36,450 and the rate of sales tax is 9%, then the total amount paid by her is
19.   The marked price of an article is Rs 80 and it is sold at Rs 76, then the discount rate is
20.   A TV set was bought for Rs 26,250 including 5% VAT. The original price of the TV set is?
21.   The hypotenuse of a right triangle with its base and height lengths 3x and 4x respectively
22.    What is the least number that should be subtracted from 1385 to get a perfect square? Also find the square root of the perfect square.
23.   Three numbers are in the ratio 1:2:3 and the sum of their cubes is 4500. Find the numbers.
24.   Difference of two perfect cubes is 189. If the cube root of the smaller of the two numbers is 3, find the cube root of the larger number.
25.   The sum of three consecutive even natural numbers is 48. Find the greatest of these numbers
26.   The age of A is five years more than that of B. 5 years ago, the ratio of their ages was 3:2. Find their present ages








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