How many 3-digit numbers have only one digit 5 in them?
问题描述:
How many 3-digit numbers have only one digit 5 in them?
答
所有三位数中只有一个5?
9*9 + 2*8*9=225?
相关推荐
- 英语填空 连词成句 选词填空1.用所给的词,选择其恰当的形式填空.A.have B.has C.there is D.there are 1.( )a postman at the door 2.( )many flowers on the fridge 3.can i( )a cup of tea I,m thirsty 4.A table( )four legs.Four tables( )sixteen legs.5.—How many erasers( )in your pencil-box?—Only one.6.Excuse me( )a toilet near here Yes,next to the bank.7.Our classroom( )eight windows.2.连词成句 1.want,join,i,to,sports,the ,club 2.at,keeping,good,i,m,goal 3.have,hot dogs,for,we,lunch,and,sausa
- 1.请你把one至nine九个数词填入下面图中的空格内,使等式成立,数字不可重复.□+□=□ □-□=□ □=□-□2.怎样把a r i h e 这5个字母排列成一个教室里面的东西?3.怎样把l l o f f i c e 这8个字母组成2个单词?4.翻译英语段,并且回答.A mother and father have 7 daughters,and each daughters has 1 brother,How many people are there in the family?There are three whole numbers.When they are multiplied together,give the same answer as when they are added.What are they?5.怎样把P S R O T这5个字母排列成一个词组?6.佩洛希这个英文名字怎样写?
- 英语翻译The numbers 1,2,3,4,5 are to be arranged in a circle.An arrangement is bad if it is not true that for every from to one can find a subset of the numbers that appear consecutively on the circle that sum to .Arrangements that differ only by a rotation or a reflection are considered the same.How many different bad arrangements are there?主要是第二句看不太懂,The numbers 1,2,3,4,5 are to be arranged in a circle.An arrangement is bad if it is not true that for ev
- GMAT Each of the integers from 0 to 9,inclusive,is written on a separate slip of blank paper and the ten slips are dropped into a hat.If the slips are then drawn one at a time without replacement,how many must be drawn to ensure that the numbers on teo of the slips drawn will have a sum of 10?a) 3b)4c) 5d)6e)7 求中文翻译
- 根据单词所给的第一个字母,填词完成句子1.The tomato is a kind of v_____2.--How many __k_________do you have?--I have only one knife3_S______we watch TV at home.4.Do you think ther'er_e________or cheap 5.You can look up a word in a _d________
- 英文IQ题及奥数题1.The clock rings every 4 seconds.If we want to count twelce times,how many seconds do you need?2.A couple hace six children but they never bear one child.Why?3.When do you go as a racing car?4.How many sides does a house have?5.Why are mules helpless in dancing?6.Why is pig always eating?7.The sun of two number is just the product of these two numbers in the mirror,What are these two numbers?8.When do horses have eight legs?9.turn"隔墙有耳"Into
- 选择填空 1.My friend,Tony,____ many volleyballs.A.has B.have C.don’t have D.have not 2.My aunt doesn’t play sports.She only watches ____ on TV.A.it B.them C.us D.her 3.I like computer games verymuch.They’re _____.A.difficult B.boring C.fun D.big 4.I have ______ They’re twins.A.a sister B.the sisters C.sister D.two sisters 5.--Do you have a soccer ball,Mike?--______.But my brother has one.A.Yes,I do B.No,I don’t C.No,he doesn’t D.Yes he does 6.I _____ a te
- A:Hello,whan can I do for you?B:I want to buy a p__ for my mother because Mother's Day is coming.A:Hello,whan can I do for you?B:I want to buy a p__ for my mother because Mother's Day is coming.A:There are many c__ scarves here.I'msure your mother will like them.B:Great ```How much is it?It's very beautiful.And purple is her f__.A:It costs $90.B:Oh,it's too expensive.Do you have a c__ one?A:What about this blue one?It's only $50.And biue can m__ any o
- 1、Which city will hold the 2012 Olympic Gamas?Is the city in USA?2、Is Hangzhou in Jiangsu Province?3、Is New York the capital of USA?4、How many legs does a butterfly have?5、Which country has the most poeple?6、In 2004,16 June falls on a Wednesday.On what day of the week will 16 June fall in 2010?7、What eight-letter word has only one letter in it?8、What fruit is never found is never found singly?9、Who were in the manned spacecraft Shen Zhou VII?10、Who's
- How many 3 digits numbers have exactly one digit 5 in them?ji
- 补全句子 Come in and ____a cup of tea.
- How many 3-digit numbers are divisible by