The total number of proper divisors of 38808 is _______.
80
70
60
50
All possible two - factor products are from the digits 1,2,3,4, ...., 200. The number of factors out of the total obtained,
which are multiples of 5, is _______.
8040
7180
6150
4040
The sum of all positive divisors of 960 is _____.
3048
2688
2248
1880
If x 3 > ( x2 + x + 2 ), then ?
x < 2
x ≥ 2
x > 2
x ≤ 2
The remainder, when number 599 is dividend by 13, is ______.
2
8
12
32
The unit digit in the number 7126 is ______.
1
3
9
5
The solution of the inequality 2x2 + x - 15 ≥ 0 is _______.
By the method of mathematical induction, the inequality 2n + 7 ≤ ( n + 3 ) 2 is true ?
For all n ∈ N
For all n < 1
Only when n is odd
Only when n is even
If n > 1 and x ≠ 0. then expression ( 1 + x)n - nx -1 is divisible by _________.
x2
x3
x5
x7
P (n) = P (n + 1 ) for all natural number n, then P (n) is ture ?
For all n
For all n > 1
For all n > m
Nothing can be said
