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英文真题

KSf 2015 - selected problems Junior

3 point problems

1. Which of the following numbers is closest to 20.15 × 51.02? (A) 100 (B) 1000 (C) 10000 (D) 100000 (E) 1000000

2. Mother did the laundry and hung t-shirts in line on a clothing line. Then she asked her children to put a single sock between any two t-shirts. Now there are 29 clothes on the clothing line. How many t-shirts are there on the line? (A) 10 (B) 11 (C) 13 (D) 14 (E) 15

3. The shaded part of the square with side (a) is bounded by a semicircle and two quarter arcs. What is its area? (A) (\frac{\pi a^2}{8}) (B) (\frac{a^2}{2}) (C) (\frac{\pi a^2}{4}) (D) (\frac{a^2}{4}) (E) (\frac{\pi a^2}{4})

4. Three sisters, Ann, Beth and Cindy, bought a bag of 30 cookies; each received 10 cookies. However Ann paid 80 cents, Beth 50 and Cindy 20. If they had divided the cookies proportionally to the price each paid, how many more cookies should Ann have received? (A) 10 (B) 9 (C) 8 (D) 7 (E) 6

中英双语真题

Kangaroo Math Competition 2015 (Malaysia) - Junior
3 points

1. Which of the following numbers is closest to 20.15 × 51.02?

Nomor yang manakah paling hampir dengan 20.15 × 51.02?
(A) 100
(B) 1000
(C) 10000
(D) 100000
(E) 1000000

2. Mother did the laundry and hung t-shirts in line on a clothing line. Then she asked her children to put a single sock between any two t-shirts. Now there are 29 clothes on the clothing line. How many t-shirts are there?

Ibu membasuh baju dan menyudahi t-shirt dalam satu barisan di atas suatu ampaian. Dia ke-mudian meminta anak-anaknya supaya menyudahi sehelai stokin diantara setiap t-shirt. Sekarang terdapat 29 helai pakaian di atas ampaian itu. Terdapat berapa t-shirt kesemuaanya?
(A) 10
(B) 11
(C) 13
(D) 14
(E) 15

3. The shaded part of the square with side (a) is bounded by a semicircle and two quarter arcs. What is its area?

Kawasan berlored pada segiempat yang mempunyai panjang sisi (a) terbatas oleh sebuah semibulatan dan dua suku bulatan. Apakah luas kawasan tersebut?
The diagram shows a square with side length (a). The shaded region is enclosed by a semicircle and two quarter-circles. Find the area of the shaded region.

(A) (\frac{\pi a^2}{8})
(B) (\frac{a^2}{2})
(C) (\frac{\pi a^2}{4})
(D) (\frac{a^2}{4})
(E) (\frac{\pi a^2}{4})