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Singapore
\( 40 \% \) of Mr Lim's house area is equal to \( 50 \% \) of Mr Lee's house area. Express as a ratio, Mr Lim's house area to Mr Loe's house area.
Algebra Jan 20, 2025
9 wire that is 40 cm long is bent into he shape of a rectangle whose width is \( x \mathrm{~cm} \). (iii) Find the maximum area that can be formed.
Pre Calculus Jan 20, 2025
(a) \( 7 \times 9-3 \times 3=\square \)
Arithmetic Jan 20, 2025
(b) \( 8+4 \times 3 \div 2=\square \)
Arithmetic Jan 20, 2025
8 Pr ectile Motion. A soccer ball is kic ed from the ground. The height, \( h \), of the ball above the ground time \( t \) seconds is given by \( h=8 t-4 t^{2} \). (i) Express the function in the form \( h=a(t-p)(t-q) \).
Pre Calculus Jan 20, 2025
8 325 children attended a concert at a school auditorium. \( \frac{4}{5} \) of the boys \( \frac{1}{4} \) and \( \frac{3}{4} \) of the girls left the auditorium at the end of the concert. 29 more boys than girls remained in the auditorium. How many girls attended the concert?
Algebra Jan 20, 2025
8325 children aftended a concert at a school auditorium. \( \frac{4}{5} \) of the boys \( \frac{1}{4} \) and \( \frac{3}{4} \) of the girls left the auditorium at the end of the concert. 29 more \( \frac{5}{20} \) boys than girls remained in the auditorium. How many girls attended the concert?
Algebra Jan 20, 2025
(c) \( y+5 x=-21 \) \( \frac{10}{9 x-7 y}=\frac{2}{y+x} \)
Algebra Jan 20, 2025
19. There are 275 durians and mangoes at a fruit stall. \( \frac{1}{3} \) of the number of durians is equal to \( \frac{1}{-} \) of the number of mangoes. How many mangoes are there?
Algebra Jan 20, 2025
Amelia had some money at first. She used \( \frac{1}{5} \) of her money to buy a wallet ar was short of \( \$ 30 \) to buy a bag. The bag cost \( \$ 210 \) more than the wallet. How much money did Amelia have at first?
Algebra Jan 20, 2025
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