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Home › Grade7 › Grade 7 Olympiad › Math Olympiad-Grade-7 › Algebraic Expressions › Algebra Worksheet-7

Algebra Worksheet-7

Algebra Worksheet-7

 

  1. Number to be added on LHS of equation to find the value of ‘y’ is (elimination method) y – 8 = 6

(a) –8                 (b) 14                  (c) 0                    (d) –6

 

  1. To get the value of p, ______ is to be multiplied on either side of equation (method of elimination)

(a) –4                 (b) 4                    (c) 1                     (d) 0

 

  1. To get the value of ‘a’, ______ to be divided on either side of equation 6a = 30 (elimination method)

(a) –6                 (b) +30              (c) +6                 (d) 0

 

  1. In value of x is

(a) –12               (b) +36               (c) +12                (d) –36

 

  1. In 6(2a – 1) + 8 = 14, the value of ‘a’ is

(a) –1                  (b)               (c)                (d) +1

 

  1. 6x – 1 = 2x + 9 value of x

(a)                  (b)              (c)                  (d)

 

  1. If six times a number is 48 then the number is

(a) –8                 (b) 1                    (c) 48                  (d) 8

 

  1. Ramu’s father is thrice as old as Ramu. If father’s age is 45 years then Ramu’s age is

(a) 45 yrs           (b) 30 yrs           (c) 15 yrs            (d) 10 yrs

 

  1. A number is multiplied by 6 and 12 is added to the product. The result is 84. Then the number is

(a) –12               (b) 72                  (c) +12                (d) –72

 

  1. The length of side of an equilateral triangular garden whose perimeter is 66 m is

(a) 66 m             (b) 11 m              (c) 3 m               (d) 22 m

 

  1. The length of a rectangle is 12 m and its are is 72 m. Then the breadth equals to

(a) 72 m             (b) 60 m            (c) 6 m               (d) 9 m

 

  1. Ages of two friends are in the ratio 2:1. If the sum of their ages is 51 then their ages are

(a) 34 yrs, 20 yrs                          (b) 34 yrs, 17 yrs

(c) 20 yrs, 10 yrs                           (d) 30 yrs, 15 yrs

 

  1. In , the value of a is

(a) 122                (b) –16               (c) 16                  (d) 0

 

  1. If a = b then ax = _____.

(a) b + x             (b) bx                  (c) b – x             (d) b ÷ x

 

  1. If a = b then a + x = ______.

(a) b + x             (b) bx                  (c) b – x             (d) b ÷ x

 

  1. If p = q then px = ______.

(a) q                    (b) qx                  (c) q + x             (d) 0

 

  1. In , the value of p is

(a) –9                 (b) +6                 (c) +9                 (d) 0

 

  1. In a piggy bank the number of 25 paise coins are five times the number of 50 paise coins. If there are 120 coins find the amount in the bank?

(a) Rs.25            (b) Rs. 10           (c) Rs.35            (d) Rs.40

 

  1. Half of a number is added to 18 then the sum is 46. The number is

(a) 92                  (b) 56                  (c) 65                  (d) 0

 

  1. The algebraic expression for the statement: ‘Product of x and a subtracted from the product of b and y’.

(a) ax – by         (b) x + a – by    (c) by – ax         (d) xa – b – y

 

Answer Key:

(1)-(b); (2)-(b); (3)-(c); (4)-(c); (5)-(d); (6)-(d); (7)-(d); (8)-(c); (9)-(c); (10)-(d); (11)-(c); (12)-(b); (13)-(c); (14)-(b); (15)-(a); (16)-(b); (17)-(c); (18)-(c); (19)-(b); (20)-(c)