Ch.2 :- Classification : Exercise 8


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Directions for Q. No. 1 to 20 : In the following questions, numbers given in four out of the five alternatives have same relationship. You have to choose the one which does not belong to the group.

1. (a) 3 : 8 (b)6 : 35 (c) 7 : 50 (d) 1 : 0 (e) 9 : 80

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1(e) In other numbers second number is one less than the square of first number. (3) ² – 1 = 8, (6) ² – 1 = 35 ……

2. (a) 1 : 2 (b) 3 : 28 (c) 4 : 65 (d)2 : 7 (e) 5 : 126

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2 (d) Second number is one more than the cube of the first number.

3. (a) 22 : 42 (b)4 : 6 (c) 11 : 20 (d) 5 : 14 (e) 9 : 16

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 3 (d) First number is one more than the half of the second number.

4. (a) 21: 24  (b) 28: 32 (c) 14: 16 (d) 70: 80 (e) 54: 62

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 4 (e) The ratio among the numbers is 7 : 8.

5. (a) 6: 23 (b) 3: 11 (c)1 : 3 (d)8:31 (e) 5 : 18

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5 (e) Second number is one less than the four times the first number

6. (a) 4 (b) 8  (c) 16 (d) 9 (e) 25

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6 (b) All other numbers are squares of natural numbers.

7. (a) 125 (b) 216  (c) 27 (d) 121 (e) 1

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7 (d) All other numbers are cubes of natural numbers.

8. (a) 6: 26 (b) 11 : 46 (c) 9: 40 (d) 16: 66 Ce) 12: 50

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8 (c) Second number is two more than the four times the first number

9. (a) 9: 80 (b) 1 : 0 (c) 6: 35  Cd) 12: 143 (e) 10: 91

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9 (e) Second number is one less than the square of the first number

10. La) 1 : 4 (b) 10: 24 (c) 8 : 18  (d) 22: 46 (e) 50: 102

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10 (b) Second number is double and the two more than the number

11. (a) 5: 9 (b) 7: 11 (c)13:17 (d) 29 : 31 (e) 17: 19

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11 (a) Second number is the next prime number to the first

12. (a) 147: 741 (b) 253 : 352 (c) 518 : 816 (d) 303 : 303 (e) 419: 914

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12 (c) Second number is the reverse of the first number.

13. (a) 22 : 44 (b) 39: 981 (c) 45: 1625  (d) 18: 164 (e) 24: 464

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13 (e) Each digit of second number is the square of the respective digit of the first number.

14. (a) 22: 0 (b) 24: 12 (c) 23: 5 (d) 18: 63 (e) 24: 18

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14 (e) Second number is the difference of the square of the digits of the first number

15. (a) 22: 8 (b) 24 : 20 (c) 32: 15 (d) 14 : 17 (e) 91: 82

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15 (c) Second number is the sum of the square of the digits of the first number.

16. (a) 426 (b) 369 (c) 279 (d) 159 (e) 819

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16 (d) Digit at the second place is the difference of first and third digits.

17. (a) 26 (b) 124 (c) 728  (d) 64 (e) 215

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17 (d) All other numbers are one less than the cube of natural numbers.

18.(a) 385 (b) 572 (c) 671 (d) 264 (e) 427

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18 (e) Digit in the middle is the sum of the other two digits.

19. (a) 43 (b) 53 (c) 63 (d) 73 (e) 83

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19 (C) All other numbers are prime numbers.

20. (a) 488 (b) 929 (c) 776 (d) 667 (e) 668

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20 (d) Sum of the digits is 20.

21. Four of the following five are alike in a certain way and  so form a group. Which is the one that does not belong to
the group ? (PNBManagement Trainee 2003)

(a) 62 (b) 42 (c) 152 (d) 110 (e) 156

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21 (d) 110 is the only number which is a multiple of 10.