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?
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)
11খ)
22গ)
23ঘ)
45Explanation
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.Related questions
দুজন লোক একই জায়গা থেকে যাত্রা শুরু করে বিপরীত দিকে ৪ মিটার হেঁটে গেল। তারপর বামদিকে ঘুরে আরো ৩ মিটার গেল। তাদের দুজনের মধ্যে দুরুত্ব কত?5% বৃদ্ধিতে x -এর বর্ধিত মান কত?৩, ৯ ও ৪ -এর চতুর্থ সমানুপাতিক কত ?যদি x+y+4 = x-y-12 = 0 হয়, তবে 2x+y = কত?যদি " +" অর্থ বিয়োগ, " -" অর্থ গুণ, " " অর্থ ভাগ এবং " " অর্থ যোগ হয়, তবে ৫ - ৫ + ৫ ৫ ৫ = ?John, twelve years old, is three times as old as his brother. How old will John be when he is twice as old as his brother?যদি হয়, তা হলে y = কত ?নিচের কোন ভগ্নাংশটি ২/৩ থেকে ছোট ?
