更多"What is the tens digit of positive "的相关试题:
[单项选择]What is the remainder when the positive integer x is divided by 2 ？（）
(1)x is an odd integer.
(2)x is a multiple of 3.
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]What is the least positive integer that is divisible by each of the integers 1 through 7, inclusive ？（）
A. 420
B. 840
C. 1,260
D. 2,520
E. 5,040
[单项选择]Is the positive integer x an even number ？（）
(1)If z is divided by 3, the remainder is 2.
(2)If x is divided by 5, the remainder is 2.
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]If n is a positive integer and k=5.1×10n, what is the value of k ？（）
(1)6,000＜k＜500,000
(2)k2=2.601×109
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]Can the positive integer p be expressed as the product of two integers, each of which is greater than 1 ？（）
(1)31＜p＜37
(2)p is odd
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]When 10 is divided by the positive integer n, the remainder is n-4. Which of the following could be the value of n ？（）
A. 3
B. 4
C. 7
D. 8
E. 12
[单项选择]If n is a positive integer and n2 is divisible by 72, then the largest positive integer that must divide n is
A. 6
B. 12
C. 24
D. 36
E. (E) 48
[单项选择]If a is a positive integer, and if the units' digit of a2 is 9 and the units' digit of (a+1)2 is 4, what is the units' digit of (a+2)2 ？（）
A. 1
B. 3
C. 5
D. 7
E. 9
[单项选择]If n is a positive integer, is the value of b-a at least twice the value of 3n-2n ？（）
(1)a=2n+1 and b=3n+1
(2)n=3
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]For any positive integer n, n＞1, the "length" of n is the number of positive primes (not necessarily distinct) whose product is n. For example, the length of 50 is 3 since 50=(2)(5)(5)
Which of the following integers has length 3 ？（）
A. 3
B. 15
C. 60
D. 64
E. 105
[单项选择]If n is a positive integer and k+2=3n, which of the following could NOT be a value of K ？（）
A. 1
B. 4
C. 7
D. 25
E. 79
[单项选择]If n is a positive integer, then n(n+1)(n+2) is ？（）
A. even only when n is even
B. even only when n is odd
C. odd whenever n is odd
D. divisible by 3 only when n is odd
E. divisible by 4 whenever n is even
[单项选择]What is the value of the two-digit num-ber x ？（）
(1)The sum of the two digits is 4.
(2)The difference between the two digits is 2.
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]If x, y, and z are single-digit integers and 100(x)+1,000(y)+10(z)=N, what is the units' digit of the number N ？（）
A. 0
B. 1
C. x
D. y
E. z
[单项选择]For what value of x is 82x-4 = 16x
A. 2
B. 3
C. 4
D. 6
E. 8
[单项选择]What is the units digit of (13)4(17)2(29)3 ？（）
A. 9
B. 7
C. 5
D. 3
E. 1
[单项选择]What is Telstar X made of
A. Titanium.
B. Asteroid material.
C. Steel
D. Uranium.
[单项选择]TENS疗法属于
A. 低频电疗法
B. 中频电疗法
C. 高频电疗法
D. 磁疗
E. 热疗
