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Practice Test 5
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SSC CGL Number System Verified Practice Test 5

15 structurally validated Number System questions with unique options, mapped answers and explanations.

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SSC CGL Practice Session

SSC CGL Number System Verified Practice Test 5

15 structurally validated Number System questions with unique options, mapped answers and explanations.

Questions
15
Marking
+2 correct, -0.5 wrong
Format
15-question practice session
Preview all 15 questions in SSC CGL Number System Verified Practice Test 5 (no login required)
  1. HCF

    1. HCF of 16 and 24 is:

    • A. 4
    • B. 6
    • C. 8 (Correct)
    • D. 12

    Explanation: 8 is the greatest common factor.

  2. Divisibility

    2. Which number is divisible by 3?

    • A. 124
    • B. 135 (Correct)
    • C. 142
    • D. 151

    Explanation: The sum of digits is 9, so it is divisible by 3.

  3. Remainder

    3. Remainder when 389 is divided by 8 is:

    • A. 3
    • B. 4
    • C. 5 (Correct)
    • D. 6

    Explanation: 389 = 8 x 48 + 5.

  4. Factors

    4. Number of factors of 49 is:

    • A. 2
    • B. 3 (Correct)
    • C. 4
    • D. 5

    Explanation: 49 has factors 1, 7, and 49.

  5. Divisibility

    5. The smallest number to be added to 998 to make it divisible by 11 is:

    • A. 2
    • B. 3 (Correct)
    • C. 4
    • D. 5

    Explanation: 998 leaves remainder 8 on division by 11, so 3 more makes it divisible.

  6. LCM-HCF

    6. If HCF of two numbers is 5 and LCM is 300, and one number is 25, the other is:

    • A. 50
    • B. 60 (Correct)
    • C. 75
    • D. 90

    Explanation: Other number = (5 x 300) / 25 = 60.

  7. Unit Digit

    7. The unit digit of 3^4 is:

    • A. 1 (Correct)
    • B. 3
    • C. 7
    • D. 9

    Explanation: 3^4 = 81, so the unit digit is 1.

  8. Natural Numbers

    8. Sum of first 20 natural numbers is:

    • A. 190
    • B. 200
    • C. 210 (Correct)
    • D. 220

    Explanation: n(n+1)/2 = 20 x 21 / 2 = 210.

  9. Fraction Comparison

    9. Which is greatest?

    • A. 2/3 (Correct)
    • B. 3/5
    • C. 5/8
    • D. 7/12

    Explanation: 2/3 is approximately 0.667, the greatest here.

  10. Remainder

    10. Remainder when 5^2 is divided by 3 is:

    • A. 0
    • B. 1 (Correct)
    • C. 2
    • D. 3

    Explanation: 25 leaves remainder 1 on division by 3.

  11. LCM

    11. LCM of 12, 18 and 24 is:

    • A. 48
    • B. 60
    • C. 72 (Correct)
    • D. 96

    Explanation: LCM(12,18,24) = 72.

  12. HCF

    12. HCF of 36, 54 and 90 is:

    • A. 6
    • B. 9
    • C. 12
    • D. 18 (Correct)

    Explanation: 18 divides all three numbers exactly.

  13. Divisibility

    13. Which of the following is divisible by 11?

    • A. 121
    • B. 132
    • C. 143
    • D. All of these (Correct)

    Explanation: 121=11×11, 132=11×12, 143=11×13.

  14. Unit Digit

    14. Unit digit of 7^52 is:

    • A. 1 (Correct)
    • B. 3
    • C. 7
    • D. 9

    Explanation: Powers of 7 cycle: 7,9,3,1 (period 4). 52÷4=13 remainder 0, so unit digit is 1.

  15. Remainder

    15. What is the remainder when 2^10 is divided by 7?

    • A. 1
    • B. 2 (Correct)
    • C. 3
    • D. 4

    Explanation: 2^3=8≡1(mod7), so 2^9≡1(mod7), then 2^10≡2(mod7).