更多"The sum of four consecutive odd pos"的相关试题:
[单项选择]What is the average of four consecutive odd numbers starting with 2n+1
A. 4
B. 2n+3
C. 2n+4
D. 2n+5 E. n+4
[单项选择]If r and s are integers and rs+r is odd, which of the following must be even ？（）
A. r
B. s
C. r+s
D. rs-r
E. r2+s
[单项选择]If S is the sum of the first n positive integers, what is the value of n ？（）
(1)S＜20
(2)S2＞220
A. 条件（1）充分，但条件（2）不充分.
B. 条件（2）充分，但条件（1）不充分.
C. 条件（1）和（2）单独都不充分，但条件（1）和条件（2）联合起来充分.
D. 条件（1）充分，条件（2）也充分.
E. 条件（1）和条件（2）单独都不充分，条件（1）和条件（2）联合起来也不充分.
[单项选择]The product of three consecutive integers must be
Ⅰ. Divisible by 3
Ⅱ. Divisible by 5
Ⅲ. Divisible by 6 ？（）
A. Ⅰ only
B. Ⅱ only
C. Ⅰ and Ⅱ only
D. Ⅰ and Ⅲ only
E. Ⅰ，Ⅱ，and Ⅲ
[单项选择]
How many positive integers k are there such that 100k is a factor of (22)(3)(53) ？（）
A. None
B. One
C. TWO
D. Three
E. Four
[单项选择]Jerome wrote each of the integers 1 through 20, inclusive, on a separate index card. He placed the cards in a box, then drew cards one at a time randomly from the box, without returning the cards he had already drawn to the box. In order to ensure that the sum of all the cards he drew was even, how many cards did Jerome have to draw
A. 19
B. 12
C. 11
D. 10
E. (E) 3
[填空题]sum的值为0，则result=sum==01：num/sum的值为 【12】 。
[填空题]If r and s are positive integers,each greater than 1,and if 11(s-1)=13(r-1),what is the least possible value of r+s ？（）
[填空题]sum的值为0，则result=sum==O1:num/sum 的值为 【12】 。
