Temperature of a place at 12:00 noon was + 5°C. Temperature increased by 3°C in first hour and decreased by 1°C in the second hour. What was the temperature at 2:00 pm?

If we denote the height of a place above sea level by a positive integer and depth below the sea level by a negative integer, write the following using integers with the appropriate signs:

a) 200 m above sea level

b) 100 m below sea level

c) 10 m above sea level

d) sea level

Write the opposite of each of the following:

a) Decrease in size

b) Failure

c) Profit of Rs.10

d) 1000 A.D.

e) Rise in water level

f) 60 km south

g) 10 m above the danger mark of river Ganga

h) 20 m below the danger mark of the river Brahmaputra

i) Winning by a margin of 2000 votes

j) Depositing Rs.100 in the Bank account

k) 20°C rise in temperature.

Write the digits 0, 1, 2, 3, ..., 9 in this order and insert ‘ + ’ or ‘–’ between them to get the result 3.

Write the integer which is its own additive inverse.