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Online Aptitude Questions with Answers on Number System

Q26. In the questions given below consists of a statement and / or a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statement(s) is / are sufficient to answer the given question. What is the two-digit number? I.The difference between the two digits is 9. II.The sum of the digits is equal to the difference between the two digits.

  1.  I alone sufficient while II alone not sufficient to answer
  2.  II alone sufficient while I alone not sufficient to answer
  3.  Either I or II alone sufficient to answer
  4.  Both I and II are not sufficient to answer
  5.  Both I and II are necessary to answer

Solution : Both I and II are necessary to answer
Q27. In the questions given below consists of a statement and / or a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statement(s) is / are sufficient to answer the given question. What is the two-digit number whose first digit is a and the second digit is b?. The number is greater than 9. I.The number is multiple of 51. II.The sum of the digits a and b is 6.

  1.  I alone sufficient while II alone not sufficient to answer
  2.  II alone sufficient while I alone not sufficient to answer
  3.  Either I or II alone sufficient to answer
  4.  Both I and II are not sufficient to answer
  5.  Both I and II are necessary to answer

Solution : I alone sufficient while II alone not sufficient to answer
Q28. In the questions given below consists of a question followed by three statements. You have to study the question and the statements and decide which of the statement(s) is/are necessary to answer the question. What is the two-digit number? I.The difference between the two-digit number and the number formed by interchanging the digits is 27. II.The difference between the two digits is 3. III.The digit at unit's place is less than that at ten's place by 3.

  1.  I and II only
  2.  I and III only
  3.  All I, II and III
  4.  I, and either II or III
  5.  Even with all I, II and III, answer cannot be give.

Solution : Even with all I, II and III, answer cannot be give.
Q29. Study the following question and statements, and decide which of the statement(s) is/are necessary to answer the question. **What is the two-digit number?** **I. Sum of the digits is 7.** **II. Difference between the number and the number obtained by interchanging the digits is 9.** **III. Digit in the ten's place is bigger than the digit in the unit's place by 1.**

  1.  I and II only
  2.  II and III only
  3.  I and III only
  4.  All I, II and III
  5.  Both (1) and (3)

Solution : Both (1) and (3)

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Q30. What least number must be added to 1056, so that the sum is completely divisible by 23 ?

  1.  2
  2.  3
  3.  8
  4.  21
  5.  None of these

Solution : 2
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Solution :

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