最新数学考试算术题总汇

a certain number is divided by 7, the remainder is 0. If the remainder is not 0 when the number is divided by 14, then the remainder must be

A.1

B.2

C.4

D.6

E.7

答案：E

many of the positive integers less than 25 are 2 less than an integer multiple of 4?

A.2

B.3

C.4

D.5

E.6

答案：E

3. If y is the average (arithmetic mean) of n consecutive positive integers, n1,what is the sum of the greatest and least of these integers?

A. 2y

B. ny

C. y/2

D. y/n

E.2n/y

答案：A

4.A positive integer with exactly two different divisors greater than 1 must be

A. a prime

B. an even integer

C. a multiple of 3

D. the square of a prime

E. the square of an odd integer

答案：D

is the least prime number greater than 83?

A.85

B.87

C.88

D.89

E.91

答案：D