11.

One factor of the expression a² + b² - 2(ac - ac + bc) is 

• (a+b-2c)

• (2a+b-c)

• (a+2h-c)

• (a-b+ 2c)

If the radius of sphere is increased by 50%, then by how much per cent the surface area will increase?

• 100

• 125

• 150

• 200

If ${\mathrm{x}}^2+\frac{1}{{\mathrm{x}}^2}$=66, then find the value of $\mathrm{x}-\frac{1}{\mathrm{x}}$

• 8

• 16

• 33

• 64

The book Leelavati' was written by

• Aryabhatta

• Brahmagupta

• Ramanujan

• Bhaskaracharya

A rectangle ABCD is divided into two equal parts horizontally. Upper part is divided into again three equal parts and lower part is divided into five equal parts. Find out the shaded part of rectangle ABCD.

• $\frac{5}{8}$

• $\frac{19}{15}$

• $\frac{19}{30}$

• $\frac{3}{8}$

1.66 x 1.66 + 0.66 x 0.66 - 1.32 x 1.66 is equal to

• 0.1

• 1

• 10

• 101

A circle and a square have the equal perimeter, then

• the area of circle is greater.

• the area of square is greater

• Both have equal areas

• Cannot be compared

The word 'Curriculum' is derived from the language

• Latin

• French

• German

• None of these

How many lines of symmetry does a circle have?

• 2

• 4

• infinite or Unlimited

• None of these

Which point is not included in the professional skills of a teacher?

• Self-knowledge

• To experiment well

• Dedication

• Satisfactory knowledge of social matter