Reasoning

    Odd Man Out
    Find the odd man out from: Travelled, Sailed, Walked & Rode
    All other are different modes of travel.
    Analogy
    Chlorophyll : Plant :: Haemoglobin : ? (analogy)
    Chlorophyll imparts green colour to the plant. Similarly, Haemoglobin imparts red colour to the blood.
    Odd Man Out
    Find the odd man out from: 80 – 9, 64 – 8, 36 – 6 & 7 – 49
    In all other pairs, One number is the square of the other.
    Analogy
    Mango : Fruit :: Potato : ? (analogy)
    Mango is Fruit in same way Potato is modified Stem.
    Analogy
    Zephyr : Gale (analogy)
    Second is a more intense form of the first.
    Odd Man Out
    Find the odd man out from: DEB, HIF, NOL & RTP
    In all other groups, the third and first letters are alternate letters, while the first two letters are consecutive letters of the alphabet.
    Odd Man Out
    Find the odd man out from: Car, Scooter, Helicopter, Aeroplane & Cycle
    All except Cycle run on fuel.
    Odd Man Out
    Find the odd man out from: 21, 69, 81 & 83
    Each of the numbers except 83, is divided by 3.
    Analogy
    Doe : Stag (analogy)
    First is the female of the second.
    Analogy
    Giant : Dwarf :: Genius : ? (analogy)
    Dwarf is the antonym of Giant. Similarly, the antonym of Genius is Idiot.