很简单啊 每相隔一项 分子分母同乘2
答案A
2/5,3/7,4/10,6/14,8/20,12/18,() a16/40 b14/32 c20/48
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相关问题
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数字推理1112/5 3/7 4/10 6/14 8/20 12/28 （ ）A、16/40 B、14/32 C、20/
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14＋16＋12＋10＋8＋2＋4＋6＋18＋20＝？
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计算2+4+6+8+10+12+14+16+18+20．
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计算2+4+6+8+10+12+14+16+18+20．
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1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,30,40,50,
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1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,30,40,50,
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1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,30,40,50,
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118,60,32,20,( ) A.10 B.16 C.18 D.20 2,7,14,21,294,( ) A.28
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3*4*5+6*8*9+9*12*15+12*16*20分之5*6*7+10*12*14+15*18*21+20*24*
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2+4+6+8+10+12+14+16+18+20+22+24+26+28+30+32+34+36+38+40+42+4