Subject

    মানসিক দক্ষতা

    Topic

    সংখ্যাগত ক্ষমতা

    Look at this series: 80, 10, 70, 15, 60, ... What number should come next?

    ক)
    20
    খ)
    25
    গ)
    30
    ঘ)
    50

    Explanation

    This is an alternating addition and subtraction series. In the first pattern, 10 is subtracted from each number to arrive at the next. In the second, 5 is added to each number to arrive at the next.

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