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  • Question
  • In a two-digit number, the digit in the unit's place is three times the digit in tenth's place. The sum of the digits is equal to 8. What is the number?


  • Options
  • A. 20
  • B. 26
  • C. 39
  • D. 13

  • Correct Answer
  • 26 

    Explanation

    Let us assume the ten's digit of the number is n. Then the unit's digit will be 3n.
    According to question,
    The sum of the digits is equal to 8.
    sum of the digit = 8
    n + 3n = 8
    ? 4n = 8
    ? n = 2
    So, ten's digit is 2 and unit's digit is 6.
    So the number = 10n + 3n = 10 x 2 + 3 x 2 = 20 + 6 = 26.


  • More questions

    • 1. 
      A chocolate has 12 equal piece. Monju gave 1/4 th of it to Anju, 1/3 rd of it to Sujata and 1/6 th of it to Fiza. The number of piece of chocolate left with Manju is?

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
    • Discuss
    • 2. 
      Third power of 4 is equivalent to :

    • Options
    • A. 64
    • B. 81
    • C. 12
    • D. 49
    • Discuss
    • 3. 
      What number should be added to 231228 to make it exactly divisible by 33?

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
    • Discuss
    • 4. 
      The probability of drawing a red card from a deck of playing cards is

    • Options
    • A. 2/18
    • B. 1/13
    • C. 1/4
    • D. 1/2
    • Discuss
    • 5. 
      [1/(1.2.3)] + [1/(2.3.4)] + [1/(3.4.5)] + [1/(4.5.6)] is equal to

    • Options
    • A. 7 / 30
    • B. 11 / 30
    • C. 13 / 30
    • D. 17 / 30
    • Discuss
    • 6. 
      Two boys, A and B, runs at 4 1? 2 and 6 Km an hour. A having 190 m start. The course being 1 Km, B wins by a distance of :

    • Options
    • A. 60 m
    • B. 65 m
    • C. 45 m
    • D. 75 m
    • Discuss
    • 7. 
      30% of 80/? = 24

    • Options
    • A. 3/10
    • B. 3/17
    • C. 1
    • D. 2
    • Discuss
    • 8. 
      A railing of 288 m is required for fencing a semi-circular park. Find the area of the park. (? = 22/7)

    • Options
    • A. 4928 m2
    • B. 9865 m2
    • C. 8956 m2
    • D. 9856 m2
    • Discuss
    • 9. 
      1178.999 x 25.001 - ? ? x 16.0011 = 29075

    • Options
    • A. 25
    • B. 15
    • C. 575
    • D. 625
    • Discuss
    • 10. 1, 1, 2, 6, 24, 96, 720

    • Options
    • A. 720
    • B. 96
    • C. 24
    • D. 6
    • E. 2
    • Discuss


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