EXERCISE 7A (OBJECTIVE TYPE QUESTIONS IN 6 10SOLUTION )

6.       When 24 is subtracted from a number, it reduces to its four – seventh. What is the sum of the digits of that number?

a)      1

b)      9

c)       11

d)      Data inadequate

e)      None of these

7.       Find the number which when multiplied by 15 is increased by 196.

a)      14

b)      20

c)       26

d)      28

8.       If a number, when divided by 4, is reduced by 21, the number is:

a)      18

b)      20

c)       28

d)      38

9.       A number whose fifth the part increased by 4 is equal to its fourth part diminished by 10, i:

a)      240

b)      260

c)       270

d)      280

10.       The difference of two  numbers is 20% of the larger number, if the smaller number is 12, the larger one is:

a)      15

b)      16

c)       18

d)      20

ANSWERS

6.C

7.A

8.C

9.D

10.A

SOLUTION 

6.       Let the n umber be X. then,

                   X – 24 = 4/7X      x -4/7 x = 24     #/7 X = 24   x = (24 x 7 /5) = 56.

                    Sum of the digits = (5 + 6)

                   = 11.

7.       Let the number be x. then, 15X – x = 196     14X = 196    

             x = 14.

8.       Let the number be x. then, X /4 = X – 21     X = 4x – 84     3X = 84     

           X = 28.

9.       Let the number be. Then, (1/5X + 4) = (1/4 X – 10)   x / 20 = 14   x = 14 x 20

        = 280.

10.       Let the larger number be x.

             Then, x – 12 20% of X   X - /5 = 12  4X / 5 = 12     x = (12 x 5 / 4)

               = 12.