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21. 在电话厅前排队，J前有13个人，问队伍总共多少人 C后有16个人 C前J后有3个人 My Answer: C 22. A circle inscribed in an equilateral triangle with side length = 10. What is the area of inscribed circle? 23. 机经的题目，W到X到Y到Z，三个送信人，一个速度70mile/分钟，一个速度80mile/分钟，一个速度100mile/分钟，总长750mile 求X到Y长， 答案是240 24. x = , if = , what is k? My Answer: k = 200. Old JJ: X=10^100，有X^X= 10^K， 问K等于多少 remeo评价意见：10^102 25. If X is between 4497 and 4509, which number is closest to 23/? My Answer: 3451 26. A right triangle is on top of a square. Square side is 100, right triangle sides are 60, 80 and 100 . How many bags of fertilizer to cover entire area? My Answer: 7 bags. 27. Make a code of different letters from 10 letters . Whats the ratio of 5 letter code to 4 letter code? My Answer: P/P = 6 28. r+s+t 是偶数么? r+s是偶数 s+t是偶数 29. 有线段AC，AC上的一段AB正好是某圆柱体的体对角线，能求出AC的长么? | 
