1. Which of the following is the cube root of -64/ 343 ?
a) 7/4 b) -7/4 c) 4/7 d) -4/7
2. Which of the following is a perfect cube ?
a) 10000 b) 243 c) 343 d) 270000
3. If 2/5x = 4 then which of the following is the value of x ?
a) -9 b) 9 c) -1/9 d) 1/9
4. Complete the given pattern including two more consecutive steps ?
72 = 49
672 = 4489
6672 = 444889
66672 = 44448889
5. What is the smallest number by which 648 must be multiplied so that the product is a perfect cube ?
6. Sove the equation -
x+3/4 = 2x-3/5
7. There are 500 children in a school , for a P.T. drill , tehy have to stand in such a manner that the number of rows is equal to the number of columns. How many children would be left out in this arrangement ?
1. d -4/7
2.c. 343
4.666672=4444488889 6666672=444444888889
5.It should be multiplied by3.
6.x+3/4=2x-3/5 2x-x=3/4+3/5 x=15+12/20=27/20
7.Let the no. of student in each row=x. Then no of student in the arrangement=x*x=x2
x2=500. x=22
22 students in each row and columns.