PSLE
Jaslyn had rubik's cubes for sale. In the morning, she sold ¹₈ of the rubik's cubes. In the afternoon, she sold ³₇ of the remaining rubik's cubes. After that, there were 44 rubik's cubes left. How many rubik's cubes did Jaslyn have at first?
Fraction of rubik's cubes left after selling in the morning
= 1 - ¹₈
= ⁷₈

Fraction of the remaining rubik's cubes after selling in the afternoon
= 1 - ³₇
= ⁴₇

⁴₇ of remaining rubik's cubes = 44
¹₇ of remaining rubik's cubes = 44 ÷ 4 = 11
⁷₇ of remaining rubik's cubes = 7 x 11 = 77

⁷₈ of total rubik's cubes = 77
¹₈ of the total rubik's cubes = 77 ÷ 7 = 11
⁸₈ of the total rubik's cubes = 8 x 11 = 88

Number of rubik's cubes at first = 88

Answer(s): 88