The temperature in a hill station on Tuesday morning was 3°C below zero. By afternoon, the temperature rose by 8°C.

(a) Represent the morning temperature and the change using integers

(b) What was the temperature in the afternoon?

Write the set of all even numbers between 1 and 15 in:

(a) Roster form (b) Set-builder form

Meena buys 3.5 kg of apples for ₹ 210.

(a) What is the cost per kg?

(b) If she buys 7.2 kg of apples, how much will she have to pay?

A box contains 45 chocolates and 30 toffees.

(a) What is the ratio of chocolates to toffees?

(b) What is the ratio of toffees to total items?