Subject

    মানসিক দক্ষতা

    Topic

    সমস্যা সমাধান

    Mary had a number of cookies. After eating one, she gave half the remaining to her sister. After eating another cookie, she gave half of what was left to her brother. Mary now had only five cookies left. How many cookies did she start with?

    ক)
    11
    খ)
    22
    গ)
    23
    ঘ)
    45

    Explanation

    23 23-1 = 22. 1/2 of 22 ='l 1. 1 1 -1 = 10. 1/2 of 10 = 5, the number of cookies Mary had left.

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