EXERCISE: MARK AGAINST THE CORRECT ANSWER IN EACH OF THE FOLLOWING: IN 111 TO 120

  111.Which one of the following numbers will completely divide (3²⁵ + 3²⁶ +3²⁷ +3²⁸)?

a)      11

b)      16

c)       25

d)      30

112.A 3-digit number 4a3 is added to another 3-digit number 984 to give a 4-digit number 13b7, which is divisible by 11. Then (a + b) =?

a)      10

b)      11

c)       12

d)      15

113.If X and y are positive integer such that (3X+ 7y) is a multiple of 11, then which of the following will be divisible by 11?

a)      4X + 6Y

                                  b)     X + y + 4

                                  c)      9X+ 4 Y

                                  d)      4X – 9Y

    116. If the number 653 Xy is divisible y 90, then (X + Y) =?

a)      2

b)      3

c)       4

d)      6

117.How many of the following numbers are divisible by 3 but not by 9?

 2133, 2343, 3474, 4131, 5286, 5430, 6336, 7347, 8115, 9276

a)      5

b)      6

c)       7

d)      None of these

118.Which of the following numbers is divisible by each one of 3, 7, 9 and 11?

a)      639

b)      2076

c)       3791

d)      37911

e)      None of these

119.How many of the following numbers are divisible by 132?

 264, 396, 462, 792, 968, 2178, 5184, 6336

a)      4

b)       5

c)       6

d)      7

120.A number when divided by 6 leaves a remainder 3. When the square of the number is divided by 6, the remainder is:

a)      0

b)      1

c)       2

d)      3

ANSWERS:

        111.(A)

        112.(B)

        113.(D)

        114.(A) 

        115.(D)

       116.(C)

       117.(B) 

      118.(B) 

      119.(A) 

      120.(D)