Question

About one fourth of the boats with a motor are big machine boats. How many thousand machine boats are there? Come on, try to do it without writing down.

Answer 1

Total boats in the country = 2,00,000
Number of boats with a motor = 200,000 − 100,000
= 1,00,000

Number of machine boats = One-fourth of the boats with motor
So, number of machine boats = 100,000 ÷ 4
= 25,000

There are 25,000 machine boats.