Multiple Choice Questions on What is the sum of all natural numbers between 100 and 1300 exactly divisible by 13 ........ for SSC CGL Exam Preparation

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Multiple Choice Questions

What is the sum of all natural numbers between 100 and 1300 exactly divisible by 13 ........

Quantitative Aptitude (CGL) Number System
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    What is the sum of all natural numbers between 100 and 1300 exactly divisible by 13

    63986

    Correct Answer

    5334

    Incorrect Answer

    5434

    Incorrect Answer

    5761

    Incorrect Answer
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    Explanation:

    104, 117, 130....... 1287
    a = 104
    d = 13
    L = 1287
    => a + (n-1) d = 1287
    => 104 +( n-1) 13 = 1287
    => (n-1) 13 = 1183
    => n - 1 = 91
    => n = 92
    S92 
    = 92 /2 [ 2 × 104 + 91 × 13]
    = 46 [ 208 + 1183]
    = 46 × 1391
    = 6398

    By: MIRZA SADDAM HUSSAIN
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