Question

On 15 May 2006 Chandran went to a shop to buy butter. He
checked the packet to see if this butter was safe to eat.
It was written on the packet - Best before 180 days from the date of packing.
Then he checked the date of packing. It was 15/01/06.
Help him find out if he should buy this butter or not.
In which month was the butter packed?
Which month will it be 180 days after 15/01/06?
Can Chandran eat it on 15th May 2006?
Do you ever check the date of packing of things you buy?
Have you seen medicines which have the expiry date written on
them? It tells you after which date it is unsafe to take
the medicine.
Find Out​

Answer 1

— Butter was packed on 15/01/06, so the month of packing is January.

— It was best to use the butter before 180 days from the date of packing.

Let’s calculate 180 days from the date of packing.

• Days in January = 17
• Days in February = 28
• Days in March = 31
• Days in April = 30
• Days in May = 31
• Days in June = 30

Days calculated so far = 17 + 28 +

31 + 30 + 31 + 30 = 167

Remaining days = 180 − 167 = 13 There will be 13 days in July.

So, the date is 13 July 2006.

— As it is safe to use the butter till 13 July 2006, Chandran can eat it on 15 May 2006.