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In which of the following situations do we use approximation?

(i) The number of people watching a particular television show.

(ii) The number of people travelling between two destinations per day.

(iii) The number of students in a class.

(iv) The number of people participating in a procession.

A) i, ii

B) ii, iii

C) iii, iv

D) i, ii, iv

34 + 56 = 90, where 34, 56 and 90 are whole numbers, satisfies ____ property of whole numbers under addition.

A) closure

B) commutative

C) associative

D) distributive

Every multiple of a given number is greater than or equal to the number.

A) True

B) False

The interior of a curve together with its boundary is called its region.

A) True

B) False

A polygon having 3 sides is called a ____.

A) pentagon

B) rectangle

C) square

D) triangle

The sum of two integers is -401. If one of them is -90, then the other number is ____.

A) -311

B) 491

C) -491

D) -391

Which of the given sets of fractions are like fractions?

A)

B)

C)

D)

The decimal form of five hundreds three tens two ones and eight tenths is ____.

A) 523.8

B) 532.8

C) 502.8

D) 538.8

If the length of a rectangle is l and its breadth is b, then its perimeter is ____.

A) l + b

B) l + 2b

C) 2l + b

D) 2l + 2b

A toy is placed in front of a mirror at a distance of 80 cm from it, then the reflected image is formed at a distance of ____ cm from the mirror.

A) 40

B) 80

C) 100

D) 160

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