Q5 of 33 Page 37

A piece of folk math: a child asked a flock of birds, “How many are you?”

A bird replied.


We and us again,


With half of us


And half to that


With one more,


Would make hundred”


How many birds were there?

Let the number of birds be ‘b’

We and us again = b + b = 2b


With half of us =


And half of that =


With one more =


Would make hundred =







⇒ 11b = 99 × 4



⇒ b = 36


Hence, number of birds = 36.


More from this chapter

All 33 →
3

two subtracted from triple is 101.

 4

Half a number added to the number gives 111. What is the number?

 1

The perimeter of a rectangle is 80 metres and its length is one metre more than twice the breadth. What are its length and breadth?

 2

From a point on a line, another line is to be drawn such that the angle on one side is 50° more than the angle on the other side. How much is the smaller angle?