Question

1. Zero (0) is

(a) the identity for addition of rational numbers

(b) the identity for subtraction of rational numbers

(c) the identity for multiplication of rational numbers

(d) the identity for division of rational numbers

2. If y be any non-zero integer, then y0

is equal to

(a) 1 (b) 0 (c) – 1 (d) not defined

3. Generalised form of a two-digit number xy is

(a) x + y (b)10x + y (c)10x-y (d)10y+x

4. The common factor of 3ab and 2cd is

(a) 1 (b) -1 (c) a (d) c

5. The factorised form of 3x – 24 is

(a) 3x x 24 (b)3 (x – 8) (c)24(x – 3) (d)3(x-12)

6. The value of (a+b) ² − (a−b) ² is

(a) 4ab (b) 4ab (c) 2 2 2a 2b  (d) 2 2 2a 2b 

7. The original price of a washing machine which was bought for 13,500 including of 8% VAT, is

(a) 12,420 (b) 14,580 (c) 12,500 (d) 13,492

8. The marked price of an article is 80 and it is sold at 76, then the discount rate is

(a) 5% (b) 95% (c) 10% (d) approx 11 %

9. 100 persons had food provision for 24 days. If 20 persons left the place, the provision will last for

(a) 30 days (b) 96/5 days (c) 120 days (d) 40 days

10. A quadrilateral whose all sides are equal, opposite angles are equal and the diagonals bisect each

other at-right angles is a .

(a) rhombus (b) parallelogram (c) square​

Answer 1

Answer:

1. (a) zero is the identity for addition of rational numbers.

2.(b) 0

3.(b) 10x + y

4.(a) 1

5.(b) 3(x - 8)

6.(a) 4ab

7.(a) 12,420

8.(a) 5%

9.(a) 30 days

10.(a) rhombus

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