2018 袋鼠数学 D-Cadet 真题 答案 详解

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英文真题

KSf 2018 - Problems Cadet (Class 7 & 8)

Time Allowed: 180 minutes

SECTION ONE - (3 points)

1. The rectangle ABCD with perimeter 4 m is divided into 4 parts by 4 horizontal and 5 vertical segments. If the sum of the lengths of the vertical segments is equal to 44 cm, find the sum of the lengths of the horizontal ones.

(A) 88 cm
(B) 102 cm
(C) 124 cm
(D) 156 cm
(E) 180 cm

1. When the letters of the word MAMA are written vertically above one another, the word has a vertical line of symmetry.

Which of these words also have a vertical line of symmetry when written in the same way?

(A) ROOT
(B) BOOM
(C) BOOT
(D) LOOT
(E) TOOT

1. Koko the kangaroo is preparing for the Olympics. In the first training series, he jumped 225 jumps in a row. Because he was tired, he jumped 196 in the second and 169 in the third series. In fourth he jumped 144, in fifth 121, and in sixth 100 jumps. How many times in a row did Koko jump in the last, eighth series?

(A) 81
(B) 79
(C) 64
(D) 58
(E) 49

1. A tank of water was (\frac{1}{2}) full. Then 200 liters were used for watering the flowers. Now the tank is (\frac{1}{3}) full. What is the full capacity of the tank?

(A) 1000 liters
(B) 1200 liters
(C) 1400 liters
(D) 1600 liters
(E) 1800 liters