PSLE
Xandra had flying saucers for sale. In the morning, she sold ²₇ of the flying saucers. In the afternoon, she sold ⁴₇ of the remaining flying saucers. After that, there were 45 flying saucers left. How many flying saucers did Xandra have at first?
Fraction of flying saucers left after selling in the morning
= 1 - ²₇
= ⁵₇

Fraction of the remaining flying saucers after selling in the afternoon
= 1 - ⁴₇
= ³₇

³₇ of remaining flying saucers = 45
¹₇ of remaining flying saucers = 45 ÷ 3 = 15
⁷₇ of remaining flying saucers = 7 x 15 = 105

⁵₇ of total flying saucers = 105
²₇ of the total flying saucers = 105 ÷ 5 = 21
⁷₇ of the total flying saucers = 7 x 21 = 147

Number of flying saucers at first = 147

Answer(s): 147