In the Finish Line competition, the organizers of the Road to Olympia asked the following question: "Bird A was flying when he met a flock of birds B flying in the opposite direction, so he said: "Hello, my friend." The leader bird replied: "Hello, we are not 100, but all of us, plus all of us, plus half of us, then plus a quarter of us and you, to make 100." How many birds are there in flock B?"

This question is worth 30 points, contestant Bao Phu could not give the correct answer. Due to time pressure, the other 3 contestants could not give the correct answer either.

If you find the answer to the calculation, scroll down to the comments to record and see how many people think the same as you.

Lam Hoang