Question

Exercise your brain here....

Let me see how critical people can think!!!
Some birds were flying and met a bird on their way. The bird greeted them; hello hundred! They said we are not hundred, we need half of us plus you to make us hundred.
Question: How many birds were flying?
Possible answers
A. 198
B. 49
C. 199
D. 51
E. 101
F. 66

Answer 1

F

Explanation:

Let the number of birds flying in group be "x"

When said, we need HALF of us, it means, HALF of x, or
`(1)/(2)x`

And then, plus the new bird (1 only) to make 100, so we can say:

`x+(1)/(2)x+1=100`

Now, we can solve the equation algebraically to get "x", to get the number of birds flying:

`x+(1)/(2)x+1=100\\1.5x+1=100\\1.5x=100-1\\1.5x=99\\x=(99)/(1.5)\\x=66`

Answer is 66

Answer choice F is right