The digits of a two-digit number differ by 5. If you interchange the digits, the sum of the resulting number and the original number is 99. Then the original number is
i) 43                                         ii) 45
iii) 36                                        iv) 27

Draw the coordinate axes and represent the following points
i) (-2,4)         ii) (1,3)
iii) (5,-3)       iv) (-5,-4)

What are the binary representations of the following decimal numbers?
18, 27, 42

A page from the pass book of Rakesh is given below:

The fractions with the same denominator are called ________ fractions.
1) unit                   2) like
3) unlike                4) equivalent

Find the variance and standard deviation for the data
35, 45, 30, 35, 40, 25

If the length and width of a tape are 2m and 28cm respectively, then they are in the ratio of
1) 100 : 16                             2) 7 : 50
3) 50 : 7                                 4) 1 : 8