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  1. The sum of eight consecutive odd numbers is 656. The average of four consecutive even numbers is 87. What is the sum of the smallest odd number and second largest even number?








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    Eight consecutive odd number = 656
    a – 6, a – 1, a – 2, a, a + 2, a + 4, a + 6 a + 8 = 656
    a = 81 ................(1)
    Smallest m = 75
    Average consecutive even numbers

    ⇒
    a - 2 + a + a + 2 + a + 4
    		= 87
    4

    ⇒ a = 86
    Second largest number = 88
    1 + 2 = 163

    Correct Option: C

    Eight consecutive odd number = 656
    a – 6, a – 1, a – 2, a, a + 2, a + 4, a + 6 a + 8 = 656
    a = 81 ................(1)
    Smallest m = 75
    Average consecutive even numbers

    ⇒
    a - 2 + a + a + 2 + a + 4
    		= 87
    4

    ⇒ a = 86
    Second largest number = 88
    1 + 2 = 163

  1. Fill in the missing number in the series.
    2    3    6    15 _?_ 157.5    630








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    2nd number
    		is in increasing order as shown above
    1st number

    Correct Option: A


    2nd number
    		is in increasing order as shown above
    1st number

  1. A regular die has six sides with numbers 1 to 6 marked on its sides. If a very large number of throws show the following frequencies of occurrence:
    1→ 0, 167; 2 → 0, 167; 3 → 0, 152; 4 → 0,166; 5 → 0,168; 6 → 0, 180. We call this die








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    For a very large number of throws, the frequency should be same for unbiased throw. As it not same, then the die is baised.

    Correct Option: B

    For a very large number of throws, the frequency should be same for unbiased throw. As it not same, then the die is baised.

  1. A train that is 280 metres long, travelling at a uniform speed, crosses a platform in 60 seconds and passes a man standing on the platform in 20 seconds. What is the length of the platform in metres?








  1. View Hint View Answer Discuss in Forum

    Let the length of platform = x m
    and train length = 280 m (given)
    According to Question

    x + 280
    		 =
    280
    6020

    ∴ x = 560 m.

    Correct Option: D

    Let the length of platform = x m
    and train length = 280 m (given)
    According to Question

    x + 280
    		 =
    280
    6020

    ∴ x = 560 m.

  1. You are given three coins: one has heads on both faces, the second has tails on both faces, and the third has a head on one face and a tail on the other. You choose a coin at random and toss it, and it comes up heads. The probability that the other face is tails is








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    The probability that the other face is tail is
    1
    		.
    3

    Correct Option: B

    The probability that the other face is tail is
    1
    		.
    3