NCERT Exemplar Solutions
Class 6 - Mathematics - Unit 7: Algebra
Writing Expressions

In questions 56 to 74, choose a letter x, y, z, p etc...., wherever necessary, for the unknown (variable) and write the corresponding expressions:

Question. 56

One more than twice the number.

Answer:

2x + 1

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Question. 57

20°C less than the present temperature.

Answer:

t - 20

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Question. 58

The successor of an integer.

Answer:

n + 1

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Question. 59

The perimeter of an equilateral triangle, if side of the triangle is m.

Answer:

3m

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Question. 60

Area of the rectangle with length k units and breadth n units.

Answer:

kn

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Question. 61

Omar helps his mother 1 hour more than his sister does.

Answer:

x + 1

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Question. 62

Two consecutive odd integers.

Answer:

2n + 1 and 2n + 3

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Question. 63

Two consecutive even integers.

Answer:

2m and 2m + 2

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Question. 64

Multiple of 5.

Answer:

5n

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Question. 65

The denominator of a fraction is 1 more than its numerator.

Answer:

x/(x + 1)

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Question. 66

The height of Mount Everest is 20 times the height of Empire State building.

Answer:

20y

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Question. 67

If a note book costs Rs p and a pencil costs Rs 3, then the total cost (in Rs) of two note books and one pencil.

Answer:

2p + 3

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Question. 68

z is multiplied by –3 and the result is subtracted from 13.

Answer:

13 + 3z

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Question. 69

p is divided by 11 and the result is added to 10.

Answer:

10 + p/11

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Question. 70

x times of 3 is added to the smallest natural number.

Answer:

3x + 1

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Question. 71

6 times q is subtracted from the smallest two digit number.

Answer:

10 – 6q

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Question. 72

Write two equations for which 2 is the solution.

Answer:

3y + 4 = 10, 2x – 3 = 1

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Question. 73

Write an equation for which 0 is a solution.

Answer:

2t + 3 = 3

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Question. 74

Write an equation whose solution is not a whole number.

Answer:

x + 1 = 0

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NCERT Exemplar Solutions Class 6 – Mathematics – Unit 7: Algebra – Writing Expressions | Detailed Answers