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Which of the following statements is INCORRECT?

AZero has a reciprocal.
BThe product of two negative rational numbers is always positive.
CThe reciprocal of a positive rational number is positive.
DThe product of two positive rational numbers is always positive.

The figure below is made up of one big circle, two identical medium circles and two identical small circles. The ratio of the radius of the small circle to the radius of the medium circle is 2 : 3.
(A) What is the total area of the unshaded part in the figure?
(B) What fraction of the big circle is shaded?



----------(A)--------------(B)
A144 π cm²--------5/18
B104 π cm²--------5/18
C104 π cm²--------13/18
D144 π cm²--------13/18

There are 6xy – 4x² – y² + 5 marbles in a box. If Ranjana takes x² – 3xy + 7y² – 2 marbles, then how many marbles are left?

A–5x² – 8y² + 9xy + 7
B6x² – 8y² + 9xy – 17
C–15x² – 8y² + 19xy – 8
D5x² + 8y² – 9xy – 7

Find the square of (n + 1), if 11√n = √343 + √112 .

A8
B7
C64
D49

Select the odd one out.

A
B
C
D

Find the difference between the place values of encircled digits in the given number.


AWatermelon and pumpkin are of equal weight.
BWatermelon is lighter than cauliflower.
CPumpkin is heavier than cauliflower.
DCauliflower is lighter than watermelon.

Find the figure from the options which will continue the same series as established by the given Problem Figures.



A
B
C
D

There are ________ horizontal and _______ vertical lines in the given figure.


A19, 18
B19, 20
C16, 18
D20, 25

A real number will have ________.
A Terminating decimal expansion
B Non-terminating decimal expansion
C Repeating decimal expansion
D Both (B) and (C)