model 1 basic number system Practice Questions Answers Test with Solutions & More Shortcuts

Question : 11

If x, y, z and w be the digits of a number beginning from the left, the number is

a) xyzw

b) wzyx

c) x + 10y + 100z + 1000w

d) $10^3$x + $10^2$y + 10z + w

Question : 12

If n and p are both odd numbers, which of the following is an even number?

a) n + p

b) n + p + 1

c) np + 2

d) np

Question : 13

For the integer n, if $n^3$ is odd, then which of the following statements are true? I. n is odd. II. $n^2$ is odd. III. $n^2$ is even

a) I only

b) II only

c) I and II only

d) I and III only

Question : 14

If (n - 1) is an odd number, what are the two other odd numbers nearest to it?

a) n, n-1

b) n, n-2

c) n - 3, n + 1

d) n - 3, n + 5

Question : 15

Which of the following is always odd?

a) Sum of two odd numbers

b) Difference of two odd numbers

c) Product of two odd numbers

d) None of these