64. The difference between a two-digit number and the number obtained by interchanging the two digits is 63. Which is the smaller of the two numbers ?

A.29

B.70

C.92

D.Cannot be determined

65. The sum of the digits of a two-digit number is 1/5 of the difference between the number and the number obtained by interchanging the positions of the digits. What is definitely the difference between the digits of that number ?

A.5

B.7

C.9

D.Data inadequate

66. If the digit in the unit?s place of a two-digit number is halved and the digit in the ten?s place is doubled, the number thus obtained is equal to the number obtained by interchanging the digits. Which of the following is definitely true ?

A.Sum of the digits is a two-digit number.

B.Digit in the unit's place is twice the digit in the ten's place.

C.Digits in the unit's place and the ten's place are equal

D.Digit in the unit's place is half of the digit in the ten's place

67. If the number obtained on interchaging the ?digits of a two-digit number is? 18 more than the original, number and the sum of the digits is 8, then, what is the?original number ?

A.26

B.35

C.53

D.Cannot be determined

68. The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number 1 :2 ?

A.4

B.8

C.16

D.None of these

69. A number consists of 3 digits whose sum is 10. The middle digit is equal to the sum of the other two and the number will be ircreased by 99 if its digits are reversed. The number is :

A.145

B.253

C.370

D.352

70. A two-digit number become five-sixth of itself when its digits are reversed. The two digits differ by one. The number is :

A.45

B.54

C.56

D.65

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