Numerical Ability

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  1. Find the missing sequence in the letter series below: A, CD, GHI,?, UVVVXY








  1. View Hint View Answer Discuss in Forum

    Correct Option: C

  1. If x > y > 1, which of the following must be true?
    i. In x > In y
    ii. ex > ey
    ii. yx > xy
    iv. cos x > cosy








  1. View Hint View Answer Discuss in Forum

    For whole numbers, greater the value greater will be its log.
    Same logic for power of e.

    Correct Option: A

    For whole numbers, greater the value greater will be its log.
    Same logic for power of e.

  1. Ram and Ramesh appeared in an interview for two vacancies in the same department. The probability of Ram's selection is 1/6 and that of Ramesh is 1/8. What is the probability that only one of them will be selected?








  1. View Hint View Answer Discuss in Forum

    P (Ram) = 1/6; p(Ramesh) = 1/8 p(only at) = p (Ram) × p (not ramesh) + p(Ramesh) × p(n0 × Ram)

    =
    1
    		+
    7
    		+
    1
    		×
    5
    6886

    ⇒
    12
    		=
    1
    404

    Correct Option: B

    P (Ram) = 1/6; p(Ramesh) = 1/8 p(only at) = p (Ram) × p (not ramesh) + p(Ramesh) × p(n0 × Ram)

    =
    1
    		+
    7
    		+
    1
    		×
    5
    6886

    ⇒
    12
    		=
    1
    404

  1. An electric bus has onboard instruments that report the total electricity consumed since the start of the trip as well as the total distance covered. During a single day of operation, the bus travels on stretches M, N, O and P, in that order. The cumulative distances travelled and the corresponding electricity consumption are shown in the table below.

    The stretch where the electricity consumption per km is minimum is








  1. View Hint View Answer Discuss in Forum

    For M ⇒
    12
    		= 0.6
    20

    N ⇒
    12
    		= 0.52
    25

    O ⇒
    20
    		= 0.66
    30

    P ⇒
    12
    		= 0.48
    30

    Correct Option: D

    For M ⇒
    12
    		= 0.6
    20

    N ⇒
    12
    		= 0.52
    25

    O ⇒
    20
    		= 0.66
    30

    P ⇒
    12
    		= 0.48
    30

  1. A five digit number is formed using the digits 1,3,5,7 and 9 without repeating any of them. What is the sum of all such possible five digit numbers?








  1. View Hint View Answer Discuss in Forum

    The digit in unit place is selected in 4! Ways
    The digit in tens place is selected in 4! Ways
    The digit in hundreds place is selected in 4! Ways
    The digit in thousands place is selected in 4! Ways
    The digit in ten thousands place is selected in 4! Ways
    Sum of all values for 1
    4! × 1 × (100 + 101 + 102 + 103 +104) = 4! × 11111 × 1
    Similarly for ‘3’ 4! × (11111) × 3
    Similarly for ‘5’ 4! × (11111) × 5
    Similarly for ‘7’ 4! × (11111) × 7
    Similarly for ‘9’ 4! × (11111) × 9
    ∴ sum of all such numbers
    4! × (11111)× (1+ 3 + 5 + 7 + 9)
    = 24 × (11111) × 25
    = 6666600

    Correct Option: B

    The digit in unit place is selected in 4! Ways
    The digit in tens place is selected in 4! Ways
    The digit in hundreds place is selected in 4! Ways
    The digit in thousands place is selected in 4! Ways
    The digit in ten thousands place is selected in 4! Ways
    Sum of all values for 1
    4! × 1 × (100 + 101 + 102 + 103 +104) = 4! × 11111 × 1
    Similarly for ‘3’ 4! × (11111) × 3
    Similarly for ‘5’ 4! × (11111) × 5
    Similarly for ‘7’ 4! × (11111) × 7
    Similarly for ‘9’ 4! × (11111) × 9
    ∴ sum of all such numbers
    4! × (11111)× (1+ 3 + 5 + 7 + 9)
    = 24 × (11111) × 25
    = 6666600