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If a^x = b^y = c^z and b² = ac, then y equals

A
B
C
D

Amar wrote exams in four subjects - Physics, Chemistry, Biology and Social Studies. The ratio of marks he got in these exams was 2 : 3 : 4 : 5. He got an aggregate of 70% in these exams. Each exam had the same maximum marks. In how many of these exams did he get more than 50%?

A 1
B 2
C 3
D 4

Two rows of number are given. The resultant number in each row is to be worked out separately based on the following rules and the question below the rows of numbers is to be answered. The operations of numbers progress from left to right.
Rules :
(i) If a two-digit even number is followed by another even number, the first one is to be divided by the second one.
(ii) If an even number is followed by a prime number, the two are to be multiplied.
(iii) If an odd number is followed by another odd number, the two are to be added.
(iv) If a three-digit number is followed by a two-digit number which is a perfect square, the second number is to be subtracted from the first number.
(v) If a three-digit number is followed by a two-digit number which is not a perfect square, the first number is to be divided by the second number.
84 14 13
360 24 17
What is the difference between the resultants of the first row and the second row?

A 100
B 46
C 56
D 90

In which of the following options, a unique triangle cannot be drawn?

APQ = 6 cm, QR = 9 cm and RP = 4 cm
BQR = 10 cm, ∠Q = 70° and ∠R = 60°
CAn equilateral triangle with the length of side 5 cm.
DAn isosceles triangle with the length of each equal side 4 cm.

The area of a square field is sq. m. The length of each side of the field, is ____.

A 8.96 m
B 10.26 m
C 13.54 m
D 12.26 m

Find the missing number in the given number pattern.


A29
B39
C27
D30

Which of the following numbers has the terminating decimal representation?

A
B
C
D

Which is the best title for the things shown below?


A Things that are big
B Things that float
C Things that are alive
D Things that have wheels

Simplify:

A2⁵
B2⁶
C2³
D2⁴

Jai and Nihal will paint the circle shown here.


• First Jai will paint of the circle.
• Then Nihal will paint another of the circle. What fraction of the circle is left to paint?

A
B
C
D