hamburger menu
All Coursesall course arrow
adda247
reward-icon
adda247
    arrow
    arrow
    arrow
    In the following number-pairs the second number is obtained by applying certain mathematical operations to the first number. Which number should repla
    Question

    In the following number-pairs the second number is obtained by applying certain mathematical operations to the first number. Which number should replace X and Y so that the pattern followed by the two numbers on the left side of :: is same as that on the right side of :: ?

    (NOTE: Operations should be performed on the whole numbers, without breaking down the number into its constituent digits. E.g. 13 - Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

    X : 243 :: 17 : Y

    A.

    X = 31 , Y = 169

    B.

    X = 27 , Y = 156

    C.

    X = 25 , Y = 171

    D.

    X = 34 , Y = 148

    Correct option is C

    Given X : 243 :: 17 : Y
    Logic - (Nine times of first number) + 18 = Second number
    X : 243
    X×\times 9 + 18 = 243
    25 ×\times​ 9 +  18 = 243
    So, X = 25
    ​17 : Y
    17 ×\times 9 + 18 = Y
    153 + 18 = Y
    171 = Y
    So, ​X = 25 , Y = 171
    Thus, the correct option is: (c)

    Free Tests

    Free
    Must Attempt

    CBT-1 Full Mock Test 1

    languageIcon English
    • pdpQsnIcon100 Questions
    • pdpsheetsIcon100 Marks
    • timerIcon90 Mins
    languageIcon English
    Free
    Must Attempt

    RRB NTPC Graduate Level PYP (Held on 5 Jun 2025 S1)

    languageIcon English
    • pdpQsnIcon100 Questions
    • pdpsheetsIcon100 Marks
    • timerIcon90 Mins
    languageIcon English
    Free
    Must Attempt

    CBT-1 General Awareness Section Test 1

    languageIcon English
    • pdpQsnIcon40 Questions
    • pdpsheetsIcon30 Marks
    • timerIcon25 Mins
    languageIcon English

    Similar Questions

    test-prime-package

    Access ‘RRB ALP Stage-1 CBT’ Mock Tests with

    • 60000+ Mocks and Previous Year Papers
    • Unlimited Re-Attempts
    • Personalised Report Card
    • 500% Refund on Final Selection
    • Largest Community
    students-icon
    353k+ students have already unlocked exclusive benefits with Test Prime!
    Our Plans
    Monthsup-arrow