The value of (-10) x (-5) + (-7) is

1

(a)

40

(b)

-43

(c)

43

(d)

23

(-43) x (-99) + 43 is equal to

1

(a)

4300

(b)

-4300

(c)

4257

(d)

-4214

If \(\bigotimes \) , O and \(\bullet\)  represent some integers on the number line, then descending order of these numbers is

1

(a)

\(\bullet ,\bigotimes ,\oslash ,O\)

(b)

\(\bigotimes ,\bullet ,\oslash ,O\)

(c)

\(O,\oslash ,\bigotimes ,\bullet \)

(d)

\(O,\bullet ,\bigotimes ,\oslash \)

(16) \(\div\) 4 is not same as:

1

(a)

(-4) \(\div\) 16

(b)

-(16 \(\div\) 4)

(c)

16 \(\div\) (-4)

(d)

-4

Insert the correct sign = or \(\neq\) in the given blank space.
21 x (-9) _____ 9 x (-21)

1

(a)

21 x (-9) = 9 x (-21)

(- 75) \(\div\) _____ = - 1

1

(a)

We have, (-75) \(\div\) 75 = -75/75 = -1             [ \(\because\) ( -a) \(\div\) a = -1 ]

(- 206) \(\div\) ____ = 1

1

(a)

We have, (- 206) \(\div\) (- 206) = -206/-206 = 1                  [ \(\because\) (-a) \(\div\) (-a) = 1 ]

1 \(\div\) a = 1 for any integer a

1

(a) True

(b) False

a \(\div\) (-1) = - a for any integer a. Take different values of a and check.

1

(a) False

(b) True

2 \(\div\) (-2) = 1

1

(a) True

(b) False

Solve (-6) - (-16)

2

(a)

Use the sign of >, < or = in the blank to make the statement true. (-3) + 7 - 19 ___ 15 - 8 + (-9)

2

(a)

The maximum temperature of a city on a particular day was 18°C while the minimum temperature recorded on the same day was -3°C. What is the fall in temperature?

2

(a)

Following number line shows the temperature in degree Celsius (^oC) at different places on a particular day.

What is the temperature difference between the hottest and the coldest places among the above?

3

(a)

At Srinagar, the temperature was -5° C on Monday and then it dropped by 2° C on Tuesday. What was the temperature of Srinagar on Tuesday? On Wednesday, it rose by 4°C. What was the temperature on this day?

3

(a)

In a magic square, each row, column and diagonal have the same sum. Check, which of the following is a magic square?

(i)

5	-1	-4
-5	-2	7
0	3	-3

(ii)

1	-10	0
-4	-3	-2
-6	4	-7

3

(a)

In a class test, (+ 3) marks are given for every correct answer and (- 2) marks are given for every incorrect answer and no marks for not attempting any question.
(i) Radhika scored 20 marks. if she has got 12 correct answers, how many questions has she attempted incorrectly?
(ii) Mohini scores (-5) marks in this test, though she has got 7 correct answers. How many questions has she attempted incorrectly?

5

(a)