早教吧 育儿知识 作业答案 考试题库 百科 知识分享

英语IQ题1.XiaoDongwrotetenlettersonthecard.Butoneletterislost(丢失).canyoufinditforhim?OTTFFSS?NT选择:1.N2.E3.T4.S2.Fillinthemissingnumber.36104555153621急

题目详情
英语IQ题
1.Xiao Dong wrote ten letters on the card.But one letter is lost(丢失).can you find it for him?
OTTFFSS?NT
选择:1.N 2.E 3.T 4.S
2.Fill in the missing number.
3 6 10
45 55 15
36 21
▼优质解答
答案和解析
1.E(one two three……的开头字母)
2.28
3(1+2) → 6(1+2+3)→ 10(1+2+3+4)

45(1+2+3+4+5+6+7+8+9 ) → 55(1+2+……+10) 15(1+2+3+4+5)
↑ ↓
36(1+2+……+8) ← 28(1+2+……+7) ← 21(1+2+……+6)