Quantity A

The number of two-digit positive integers for which the units digit is not equal to the tens digit

Quantity B

80

111213141516171......47484950 is a multiple-digit integer.

The digits of the integer above are the digits of the integers from 11 to 50 written in consecutive order.

Quantity A

The figure on the $26^{th}$ digit of the integer (left to right)

Quantity B

The figure on the $45^{th}$ digit of the integer (left to right)

A person counts positive integers from 1 to X. Which of the following statements could determine X?

Indicate all that is/are true.
If the sum of 11 consecutive integers is 22, then what's the least of the list of numbers?
The sum of a set of n consecutive integers is 30

Quantity A: n

Quantity B: 4
The median of a list of k consecutive integers (k is an odd integer) is m

Which of the following statements must be true?

Indicate all that is/are true.

Quantity A

Product of even integers from -12 to 6 inclusive

Quantity B

Product of odd integers from -5 to 13 inclusive

Quantity A: The positive difference between the sum of all the even integers and the sum of all the odd integers from 1 to 50, inclusive

Quantity B: 25
If a and b are both positive odd numbers, then the ones digit of (ab+1) could be?

Indicate all such numbers.
Integer a is 125 more than integer b. Which of the following statement(s) must be true?

Indicate all such statements.
If x and y (x < y) and both integers, while $x^{2}$+$y^{2}$ is an even integer, then which of the following must also be an even integer?

Indicate all that are true.
If c and d are odd positive integers, which of the following could be odd?

Indicate all such expressions.
If x is an odd negative integer and y is an even integer, which of the following statements must be true?

I. (3x - 2y) is odd

II. x$y^{2}$ is an even negative integer

III. ($y^{2}$-x) is an odd negative integer

Quantity A

The number of integers from 1 to 100 (inclusive) that are both even and the square of an integer

Quantity B

The number of integers from 1 to 100 (inclusive) that are both odd and the square of an integer

If x and y are integers, and w=($x^{2}$)y+x+3y, which of the following statements must be true?

Indicate all such statements.
If the difference between the product and sum of five integers a, b, c, d, e is an even integer, then the number of even integers among these five numbers CANNOT be?

Indicate all that are true.
r, s, and t are three consecutive odd integers such that r < s < t.

r + s + 1

Quantity B

s + t – 1

If j and k are even integers and j < k, which of the following equals the number of even integers that are greater than j and less than k?
w, x and y are consecutive even integers. wxy=0, w < x < y.

x

Quantity B

0

How many integers from 100 to 200 are both multiples of 3 and odd numbers?
1 2 ... 7 8 9 10 11 12 13 ... 27 28

25000 +道题目

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