Đây là tài liệu toán tiếng anh phục vụ cho các kì thi toán sử dụng bằng ngôn ngữ tiếng anh như Math Violympic, Toán Tuổi Thơ,...Đây là các bài toán ít dùng lời nên chủ yếu là kiến thức toán về phân số, tính ngược, số và chữ số, dãy số và tính tuổi với các câu hỏi làm cho nhiều học sinh chưa làm hết như tìm b+5...
Trang 1Review Math for Grade 4 and 5 TIME: 60 MINUTES
1) Find a and b + 5: 1a− 1
b=
3
154
2) Find a – b :2a+ 3
b=
13 12
3) Find b: b8< 1
4
4) Find a: 2a=a
8
5) Find a: 13a < 8
65
6) Find b + 5: 34:6
b:
8
7=
3
8:
4
5:
6 7
7) The shop has some rice The first day sold 1/3 of rice and 5 kg The rice on the second day sold if another 3 kg shall be 3/7 the remaining rice The third day of the rice sold by the remaining 4/5 and 2 kg At the time remaining true 1 / 4 a quintal Count of rice each day sold
8) Find X:21−x 35−x= 1
3
9) Find X:7−x 8+ x= 1
2
10) Find X:1 x 22 + 2
2 x 3+
2
3 x 4+…+
2
99 x 100= x x 15
11) Find X:47< x
10<
5 7
12) Find X: abc + cba = 1332 ( a, b , c are three consecutive natural number ) ; x
= abc + 102
13) Find X: 4x87y divisible by 2 ; 5 ; 9
14) From 1 to 2015 we use ……… digits including …… digits 1
15) The 2003th digit in sequence: 2; 4; 6; 8 ; 2000; 2002 is ……
16) Find 2 numbers in sequence 6; 24; 60; 120; 210; …; …
17) Mai has 25 marbles, Binh’s is less than the average of their is 3 marbles Lan
Trang 2has the number of marbles equals the average of theirs Quan’s is less than the average of theirs is 4marbles Find the average of Lan and Quan’s marbles
18) In the sequence of word ASEANASEANASEAN… Hoa colors turns green, red,
purple, green, red, … Find the color of 2052th word in the sequence
19) Given the sequence of numbers 1; 3; 5; ; x Find x indicates the number of digits in sequence over 4 times the number of sequence
20) 2 years ago, dad’s age was over 6 times son’s Next 2 years, dad’s age will be over 4 times son’s Find the ratio of the dad’s and son’s