PSLE
Kylie had flying saucers for sale. In the morning, she sold ³₁₀ of the flying saucers. In the afternoon, she sold ²₅ of the remaining flying saucers. After that, there were 42 flying saucers left. How many flying saucers did Kylie have at first?
Fraction of flying saucers left after selling in the morning
= 1 - ³₁₀
= ⁷₁₀

Fraction of the remaining flying saucers after selling in the afternoon
= 1 - ²₅
= ³₅

³₅ of remaining flying saucers = 42
¹₅ of remaining flying saucers = 42 ÷ 3 = 14
⁵₅ of remaining flying saucers = 5 x 14 = 70

⁷₁₀ of total flying saucers = 70
³₁₀ of the total flying saucers = 70 ÷ 7 = 10
¹⁰₁₀ of the total flying saucers = 10 x 10 = 100

Number of flying saucers at first = 100

Answer(s): 100