Numbers Worksheet-2

Numbers Worksheet-2

1. If p: when a positive integer and a negative integer are added we always get a negative integer.

q: when two negative integers are added, we get a positive integer, then

(a) Both p and q are true            (b) p is true and q is false

(c) p is false and q is true           (d) Both p and q are false

2. In a magic square each row, column and diagonal have the same sum, then the values of A and B are

(a) –7, –4          (b) –4, –7           (c) –4, –6          (d) –6, –4

3. The value of |7| + |5| – |7| – |– 3|, where || is absolute value of an integer is

(a) 0                    (b) 1                    (c) 2                    (d) 3

4. If p : a ÷ b = b ÷ a

q : (a ÷ b) ÷ c ≠ a ÷ (6 + c), then

(a) Both p and g are true            (b) p is true and q is false

(c) p is false and q is true           (d) Both p and q are false

5. An insect crawls up 5 cm every second on a 60 cm vertical rod and then falls down 2 cm over the next second. How many seconds will it take to climb the rod?

(a) 20 seconds  (b) 39 seconds  (c) 40 seconds  (d) 30 seconds

6. A tanker contains 500 litres of water. Due to a small hole in the tanker, the quantity of water is decreasing at the rate of 9 litres every hour. What will be the quantity of water in the tank after 10 hours?

(a) 410 litres     (b) 491 litres     (c) 400 litres     (d) 90 litres

7. If p : 0 + (– 7) = 0

q : (–8) + 0 = not defined, then

(a) Both p and q are true            (b) p is true and q is false

(c) p is false and q is true           (d) Both p and q are false

8. Which integer is the additive inverse of itself?

(a) –1                  (b) 1                    (c) 0                    (d) 2

9. Predecessor of successor of –21 is

(a) –20               (b) –19               (c) –22               (d) –21

10. If 15 × (a + 5) = 15 × (–4) + 15 × 5, then a is

(a) –1                  (b) –2                 (c) –3                 (d) –4

11. The value of |–4| × 7 + 3 × (|2| – 5) is (where | · | stands for absolute value of integer)

(a) 37                  (b) 19                  (c) –120             (d) –93

12. If (–9) + (–10) * (–9) – (–10), then *, is

(a) >                    (b) <                   (c) ≥                    (d) ≤

13. If p : 15 ÷ (3 + 5) ≠ (15 + 3) + (15 ÷ 5) and q : Distributive law over addition holds in division

(a) Both p and q are true            (b) p is true and q is false

(c) p is false and q is true           (d) Both p and q are false

14. The value of [(–4) × (–9) × (–25)] ÷ [(–2) × (–3) × (–5)] is

(a) 10                  (b) 20                 (c) 30                  (d) 40

15. The value of (–5) + (–4) – (–4) – (–5) + (–5) + (–4) – (–5) + (–4) is

(a) – 4                (b) –5                 (c) 0                    (d) –8

16. Which one is correct?

(a) All natural numbers are whole numbers, all whole numbers are integers

(b) All whole numbers are integers, all integers are natural numbers

(c) All integers are whole numbers, all natural numbers are integers

(d) All integers are whole numbers, all integers are natural numbers

17. A gardener plans to plant 630 trees in 21 rows each containing the same number of trees, then how many trees will there be in each row.

(a) 300               (b) 30                 (c) 21                  (d) 3

18. The difference of the sum of even number and sum of odd numbers between 10 and 20 is

(a) 13                  (b) 14                  (c) 15                   (d) 16

19. The value of (–1)²⁷ × (–1)⁵³ × (–1)⁴ is

(a) –1                  (b) 1                    (c) –1 or 1          (d) 2

20. The value of X in

–19 × (4 + (–2)) = –19 × 4 + (–19) × x, is

(a) 2                    (b) –19               (c) 4                    (d) –2

Answer Key:

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