Algebra Important Questions

7th Standard EM

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Maths

Time : 01:00:00 Hrs
Total Marks : 50
    5 x 1 = 5
  1. An algebraic statement which is equivalent to the verbal statement “Three times the sum of x and y” is

    (a)

    3(x + y)

    (b)

    3 + x + y

    (c)

    3x + y

    (d)

    3 + xy

  2. When we subtract ‘a’ from ‘-a’, we get _______

    (a)

    0

    (b)

    2a

    (c)

    -2a

    (d)

    -a

  3. In an expression, we can add or subtract only…

    (a)

    Like terms

    (b)

    Unlike terms

    (c)

    All terms

    (d)

    None of the above

  4. The solution of 3x + 5 = x + 9 is

    (a)

    2

    (b)

    3

    (c)

    5

    (d)

    4

  5. The equation y + 1 = 0 is true only when y is

    (a)

    0

    (b)

    -1

    (c)

    1

    (d)

    -2

  6. 5 x 1 = 5
  7. The variable in the expression 16x − 7 is _________

    ()

    x

  8. In the expression 25m + 14n, the type of the terms are ________ terms.

    ()

    unlike

  9. The numerical co-efficient of the term −xy is ________.

    ()

    -1

  10. The subtraction of 5m from −3m is __________

    ()

    -8m

  11. An expression equated to another expression is called __________

    ()

    equation

  12. 5 x 1 = 5
  13. x + ( −x) = 0

    (a) True
    (b) False
  14. 2pq and − 7qp are like terms

    (a) True
    (b) False
  15. The expressions 8x + 3y and 7x + 2y can not be added.

    (a) True
    (b) False
  16. Sum of a - b + c and -a + b - c is zero.

    (a) True
    (b) False
  17. The expression 7x + 1 can not be reduced without knowing the value of x.

    (a) True
    (b) False
  18. 8 x 2 = 16
  19. Find the numerical coefficient of each of the following terms: −3yx, 12k, y, 121bc, − x, 9pq, 2ab

  20. Identify the like terms among the following : 7x, 5y, −8x, 12y, 6z, z, −12x, −9y, 11z.

  21. Subtract:
    (i) 4k from 12k
    (ii) 15q from 25q
    (iii) 7xyz from 17xyz.

  22. What should be added to 3x + 6y to get 5x + 8y?

  23. Find two consecutive odd numbers whose sum is 200.

  24. Find the expression to be added with 5a − 3b + 2c to get a − 4b − 2c?

  25. Identify the co-efficients of the terms of the following expressions
    (i) 2x-2y
    (ii) x+y+3

  26. Group the like terms together from the following :6x, 6, -5x, - 5, l,x, 6y,y, 7y, 16x, 3

  27. 3 x 3 = 9
  28. Identify the variables, terms and number of terms in each of the following expressions: (i)12 −x
    (ii) 7 + 2y
    (iii) 29+3x+5y
    (iv) 3x–5+7z

  29. In an examination, a student scores 4 marks for every correct answer and loses one mark for every wrong answer. If he answers 60 questions in all and gets 130 marks, find the number of questions he answered correctly.

  30. If A=2a2-4b-1; B=5a2+3b-8 and C=2a2+9b+3 then find the value of A-B+C.

  31. 2 x 5 = 10
  32. Subtract:
    i) 7pq from 11pq
    ii) – a from a
    iii) 5x + 7 from 21x + 9

  33. Mani and his friend Mohamed went to a hotel for dinner. Mani had 2 idlies and 2 dosas whereas Mohamed had 4 idlies and 1 dosa. If the price of each idly and dosa is x and y respectively, then find the bill amount in x and y.

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