the 215th term of the expression A=1-7+13-19+25-31...
The 215th term of the expression A=1-7+13-19+25-31+⋯ is
1.The term 215th of the expression A=1-7+13-19+25-31+⋯ is...
2.The number of values of n such that n2+34 which is a square number is...
3.Given a division If dividend and divisor are increased to 90 and 6 units respectively,then the quotient and the remainder are not changed the quotient is...
Giúp mình với
cau 2 la n=1 chu cau 1 voi 3 minh ko biet
The 215th term of the expression A=1-7+13-19+25-31+⋯ is
Question 2:
The number of factors of 120 is
Question 5:
Find four integer numbers a,b,c,d such that
a + b + c + d = 1
a + c + d = 2
a + b + d = 3
a + b + c = 4
Answer: (a;b;c;d)=()
Question 6:
The 215th term of the expression A=1-7+13-19+25-31+⋯ is
Question 7:
A natural number will be increased by 9 times ifthe digit 0 is written between tens digit and units digit.The number is
Question 8:
Calculate: 1×2+2×3+⋯+100×101=
Question 9:
The root of the equation (x+1)+(x+2)+(x+3)+⋯+(x+100)=5750 is x=
Question 10:
The sum of digits of 31000 is A,the sum of digits of A is B,and the sum of digits of B is C.The value of C is
2: Ước của 120 là:
{1;2;3;4;5;6;8;10;12;15;20;24;30;40;60;120}
9: x+ (1+2+3+4+...+100) = 5750
x + 5050= 5750
x = 5750 - 5050 = 700
6. Chữ số thứ 215 là 1285
cau 2 la co 16 uoc
cau 5 a=7 b=-1 c=-2 d=-3
Question 1:
The least common multiple of 330; 65; 15 is
Question 2:
Given seven numbers: 25; 17; 39; 43; 239; 1021; 1023.
The composite numbers are
(Write numbers in order from the least to the greatest and use ";")
Question 3:
The common factors of 18 and 27 are
(Write numbers in order from the least to the greatest and use ";")
Question 4:
Given the set of even numbers: {2; 4; 6; …; 100}.The number of elements is
Question 5:
Find four integer numbers a,b,c,d such that
a + b + c + d = 1
a + c + d = 2
a + b + d = 3
a + b + c = 4
Answer: (a;b;c;d)=()
Question 6:
Find a four-digit natural number that is less than 2015.If the thousands digit is erased,the number will be decreased by 9 times.
Answer:The number is
Question 7:
Calculate: 1×2+2×3+⋯+100×101=
Question 8:
The term of the expression A=1-7+13-19+25-31+⋯ is
Question 9:
Given the expression A= ...
Find the value of n such that 2A+3=
Answer: n=
Question 10:
A natural number has six digits and the units digit is 4.If the units digit is moved to the first row then the number will be increasedby 4 times.The number is
Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions from 18 to 25.
The three phases of human memory are the sensory memory, the short-term memory, and the long- term memory. This devision of the memory into phases is based on the length of time of the memory.
Sensory memory is instantaneous memory. It is an image or memory that enters your mind only for a short period of time; it comes and goes in under a second. The memory will not last longer than that unless the information enters the short-term memory.
Information can be held in the short-term memory for about twenty seconds or as long as you are actively using it. If you repeat a fact to yourself, that fact will stay in your short-term memory as long as you keeprepeating it. Once you stop repeating it, either it is forgotten or it moves into long term memory.
Long-term memory is the huge memory tank that can hold ideas and images for years and years. Information can be added to your long-term memory when you actively try to put it there through memorization or when an idea or image enters your mind on its own.
The expression “is based on” in the first paragraph could be best replaced by______________
A. Is on the top of
B. is at the foot of
C. depends on
D. is below
Đáp án C
“is based on” = “depends on”: phụ thuộc vào, dựa vào
a) find the next two term in the sequence: 1; 4; 9; 16; 25;....;.....;
Answer:
b) find the smallest two-digit number whose number is 7 times the sum of its digits?
Answer:
Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions from 18 to 25.
The three phases of human memory are the sensory memory, the short-term memory, and the long- term memory. This devision of the memory into phases is based on the length of time of the memory.
Sensory memory is instantaneous memory. It is an image or memory that enters your mind only for a short period of time; it comes and goes in under a second. The memory will not last longer than that unless the information enters the short-term memory.
Information can be held in the short-term memory for about twenty seconds or as long as you are actively using it. If you repeat a fact to yourself, that fact will stay in your short-term memory as long as you keeprepeating it. Once you stop repeating it, either it is forgotten or it moves into long term memory.
Long-term memory is the huge memory tank that can hold ideas and images for years and years. Information can be added to your long-term memory when you actively try to put it there through memorization or when an idea or image enters your mind on its own.
he expression “on its own” in the last sentence can be best replaced by “______________”
A. by itself
B. in it own time
C. with its possessions
D. in only one way
Đáp án A
“on its own” = “by itself”: tự nó, tự bản thân nó
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42
The three phases of human memory are the sensory memory, the short-term memory, and the long- term memory. This division of the memory into phases is based on the length of time of the memory.
Sensory memory is instantaneous memory. It is an image or memory that enters your mind only for a short period of time; it comes and goes in under a second. The memory will not last longer than that unless the information enters the short-term memory.
Information can be held in the short-term memory for about twenty seconds or as long as you are actively using it. If you repeat a fact to yourself, that fact will stay in your short-term memory as long as you keep repeating it. Once you stop repeating it, either it is forgotten or it moves into long term memory.
Long-term memory is the huge memory tank that can hold ideas and images for years and years. Information can be added to your long-term memory when you actively try to put it there through memorization or when an idea or image enters your mind on its own.
The expression “on its own” in the last sentence can be best replaced by
A. by itself
B. in its own time
C. with its
D. in only one way
Đáp án A
- “on its own” = “by itself”: tự nó, tự bản thân
Dẫn chứng: “Information can be added to your long-term memory when you actively try to put it there through memorization or when an idea or image enters your mind on its own. (Thông tin có thể được bổ sung vào trí nhớ dài hạn khi bạn tích cực cố gắng lưu giữ nó ở đó thông qua sự ghi nhớ hoặc là khi một ý tưởng hay hình ảnh tự động vào tâm trí của bạn.)