更多"Can the positive integer p be expre"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]According to the passage, positive ions can be produced by ______.
A. computer display screens
B. thunderstorms
C. earthquakes
D. typhoon
[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]What is the tens digit of positive integer x ?()
(1)x divided by 100 has a remainder of 30.
(2)x divided by 110 has a remainder of 30.
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 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]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, 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 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]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]The maximum number of dara that can be expressed by 8 bis is ().
A. 64
B. 128
C. 255
D. 256
[单项选择]Which of the following can be expressed as the sum of three consecutive integers
A. 17
B. 23
C. 25
D. 30
E. (E) 40
[单项选择]The maximum number of data that can be expressed by 8 bits is (72) 。
A. 64
B. 128
C. 255
D. 256
[单项选择]The maxmum number of data that can be expressed by 8 bits is ______.
A. 64
B. 128
C. 255
D. 256