Reasoning

    Analogy
    Circuitous : Route (analogy)
    First denotes a roundabout way of the second.
    Verbal Classification
    Choose the word which is different from the rest: Spiracles, Gills, Lungs, Trachea, Stomata
    All except Stomata are respiratory organs in animals.
    Verbal Classification
    Choose the word which is different from the rest: Discus, Spear, Javelin, Hockey
    All except Spear are items of sport, while spear is a weapon.
    Odd Man Out
    Find the odd man out from: 25631, 33442, 34424 & 52163
    In all other numbers, the sum of the digits is 17.
    Analogy
    ‘Forest’ is related to ‘Vivarium’ in the same way as ‘sea’ is related to: (analogy)
    As ‘Forest’ and ‘Vivarium’ have the same meaning in the same ‘Sea’ and ‘Aquarium’ have the same meaning.
    Analogy
    Gland : Enzyme (analogy)
    First produces the second.
    Verbal Classification
    Choose the word which is different from the rest: Turtle, Lamb, Colt, Bitch, Farrow
    All except Bitch are young ones of animals, while bitch is a female dog.
    Analogy
    Man : Machine :: Master : ? (analogy)
    Machine is made to work by a man. Similarly, slave works under the instruction of his master .
    Analogy
    Square : Diamond :: Circle : ? (analogy)
    Second is a shape obtained by pulling the opposite ends of the first.
    Odd Man Out
    Find the odd man out from: Fog, Cloud, Rain & Mist
    All except Cloud are different forms of precipitation.