There are 7 people numbered as 1 to 7.

The number denotes their height.

Arrange them in a line in such a manner so that the line appears in alternative of their heights, I.e. one short then long, again short then long.

The condition is that, if one by one member(remove 1, then 2, then 3) from the line is omitted, the order of their height remains alternative.

## When do you have Rs.60

You are depositing Rs. 3 in First day and Rs. 3 in Second day in your account. And you are withdrawing Rs. 4 from your account in Third day. You do this repeatedly. When soon do you have Rs. 60?

Check your answer:-

Click here to See SolutionThus you would have reached Rs. 60 in (60/2)*3 = 90 days, but important thing to notice is that you are withdrawing Rs. 4 on every third day so your balance will reach Rs.60 mark earlier than that.

So, if we observe we will reach (60-6)=Rs.54 in (54/2)*3=81 days, and as you will deposit Rs.6 in next two days, you will reach Rs.60 in 83days.

## Which is better scheme?

For a TV (worth Rs. 50000), a showroom announced two discount schemes.

First scheme is 65% discount.

Second scheme is ‘Ten times 10% discount on price over and over’.

**Which one do you choose and why?**

Check your answer:-

Click here to See SolutionX – X*10/100 = 90X/100, final price is 9/10th of initial price.

Thus price after 10 times discount of 10% over and over will be X(9/10)^10 = 0.3486X.

While price after 65% discount will be 0.35X.

Thus it will be more beneficial to choose Second scheme.

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