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6. Dakshita was solving a problem which is as follows:

21 – 9 + (–13) = 21 + 22 = 43
What error did she make?
7. Priyanshi went shopping at the mall and parked her car in the third basement, which is 3 floors
below the ground level. Then, she took the elevator to the next sixth floor. What floor did she end
up on?
8. Every month, Jyoti delivers refreshments to the kids at a blind school. She made the decision to serve
ice cream on a special occasion because it was summer. At first, she gave the kids 18 ice creams
that she had taken from the ice cream vendor. She later grabbed fourteen more ice creams from the
vendor and gave him back seven. In total, how many ice creams did Jyoti purchase from the vendor?
Assist her with using an integer on the number line to reflect the quantity of ice cream purchased.
CompetenCy Based Question

9. In a timed quiz involving 4 teams, the scores for each team over three rounds were as follows: Team
A scored –10, 12, and 19 points; Team B scored 21, 10, and –17 points; Team C scored 25, 18, and –20
points; and Team D scored 20, 5, and –10 points. Find out which team had the highest total score.
10. Write five distinct integers whose sum is 5.

11. Sea level is the height of the ocean's surface and is used as a Different ground levels
starting point to measure the height of land and hills. Land Sea level
that is higher than sea level includes mountains and hills. It
helps us understand and compare different heights on Earth. Case study

Points Location
A 8 km above sea level

B 12 km below sea level
C 11 km above sea level

D 9 km below sea level
The location of some points is listed above. Answer the questions based on it.
(a) Using integer, find the location of point A, B, C and D.

(b) Which of the four points is at the highest elevation from the sea level?
(c) What is the vertical distance between point B and C?
(d) If the elevation of point E is 5 km below the elevation of point B. What is the elevation of
point E?

Brain Sizzlers

Niharika and Nidhi went to Manali in their Dussehra break. Suddenly, they decided to go for trekking
there. The mountain they chose for trekking was completely covered with ice, which caused them to
slip repeatedly. Their upward movements on the ice mountains were represented by positive integer and downward
movement by negative integer as follows:
Niharika Movement: +24 + (–27) + 24 + (–27) + 24 + (–27) + 24 + (–27) + 24
Nidhi Movement: +37 + (–32) + 37 + (–32) + 37 + (–32) + 37 + (–32) + 37
Who is at higher level and by how much?

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