1. In a quiz, positive marks …
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1. In a quiz, positive marks are given for correct answers and negative marks are
given for incorrect answers. If Jack’s scores in five successive rounds were 25, –
5, – 10, 15 and 10,What was the total at the end?
2. At Srinagar 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 plane is flying at the height of 5000 m above the sea level. At a particular point,
it is exactly above a submarine floating 1200 m below the sea level. What is the
vertical distance between them?
4. Mohan deposits ` 2,000 in his bank account and withdraws 1,642Rs from it, the
next day. If withdrawal of amount from the account is represented by a negative
integer, then how will you represent the amount deposited? Find the balance in
Mohan’s account after the withdrawal.
5. Rita goes 20 km towards east from a point A to the point B. From B, she moves 30
km towards west along the same road. If the distance towards east is represented
by a positive integer then, how will you represent the distance travelled towards
west? By which integer will you represent her final position from A?
6. Water tank has steps inside it. A monkey is sitting on the topmost step (i.e.
the first step). The water level is at the ninth step.
(i) He jumps 3 steps down and then jumps back 2 steps up. In how many jumps
will he reach the water level?
(ii) After drinking water, he wants to go back. For this, he jumps 4 steps up
and then jumps back 2 steps down in every move. In how many jumps will
he reach back the top step?
(iii) If the number of steps moved down is represented by negative integers
and the number of steps moved up by positive integers, represent his
moves in part (i) and (ii) by completing the following;
(a) – 3 + 2 – ... = – 8 (b) 4 – 2 + ... = 8.
In (a) the sum (– 8) represents going down by eight steps. So, what will
the sum 8 in (b) represent?
7. Verify a – (– b) = a + b for the following values of a and b.
(i) a = 21, b = 18 (ii) a = 118, b = 125
(iii) a = 75, b = 84 (iv) a = 28, b = 11
8. (-2)x(-2)x(-2) =
9. By how much does 8 exceed -4?
10.Start with the integer -8. Add -12 to it, subtract 10 from the result. Divide the result
by 3 and multiply the result by -2. What do you get?
Posted by 127 Tekuula Sreeja 2 years, 9 months ago
- 5 answers
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Ravneet Kaur 2 years, 9 months ago
0Thank You