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ĐỀ ÔN THI CÂU LẠC BỘ TOÁN TUỔI THƠ
NĂM HỌC 2015-2016 (Đề thi cá nhân)
(Thời gian làm bài: 30 phút)
Ghi kết quả đúng vào cột kết quả từ bài 1 đến bài 15. Bài 16 trình bày lời giải xuống bên dưới.
Bài
1
2
Nội dung bài tập
Kết quả
Calculate the value of the following expression:
2
23
23 4
2  3  ....  19  20


 ..... 
1 2 1 2  3 1 2  3  4
1  2  3  4  ....  19  20
Given A = 2 x 2 x 2 x …. x 2 x 2 – 2
2016 digits 2
If A is divided by 5 or not?
3
A book contains 248 pages. How many digits are needed to number
the pages of that book?
4
There was a four-digit number 3aa1. It is divided by 9. What’s digit
a in the above number?
5
6
7
8
9
10
11
The sum of two consecutive numbers is 2014. When delete digit 1 in
the units of the large number we will have the new number which is
the same as the small number. What’s the large number.
3405 digits used to print the page numbers of a book. How manny
pages does the book have?
A shop sold a shirt and one trousers. The price of each item was
300000dong. That shop eanred 20% of interest after selling the shirt
and had 20% of capital loss after selling the trousers. How much did
that shop get interst or capital loss after selling the shirt and the
trousers?
Sea water contained 3% of salt. Given 1,3 l sea water weighed
1365g. How many liters of sea water must be evaporated to gain
252kg of salt?
There was a barrel of oil which wasn’t full.The part of barrelvwhich
1
contained oil was as much the part of barrel without oil.After
5
1
pouring 8 l of oil into the barrel, the part contained oil was
as
2
much the part without oil. How many liters of oil did that barrel have
at first?
There were a group of 12 people. Each person could rest in 10 days.
The sum of day offs is divided by each person equally. When they
sarted the vacation, there were 3 people took part in this group. How
many days did each person could rest in reality?
H
G M
P K
T
Điểm
12
13
The following figure is represented for a cube.
In that cube which letter is opposite to the letter H?
It took 2 hours for a canoe to travel up stream from A to B and 6
hours for it to travel down stream from B to A. How long did it take
for the group of azollas to float along the stream from A to B?
The area of a rectangle is equal to a square’s area. The square’s side
is 4cm less than the rectangle’s length but 3cm more than the
rectangle’s width. What’s the perimeter of the rectangle?
14
C
D
111
15
E
2
B
F
A
In the figure, squares ABCD and AFED have the same side AD
which is 10cm. The curve BD and DF are arcs of ¼ of circles.
What’s the area of the dark part?
There were 5 students took part in Small Mathemetician Olympic
Competition. They got the first,second and third prizes. Given who
gained 20 points would get the first prize, 19 points would get the
second one and 18 points would get the third one. The sum of points
five students had was 93 points. How many students got the first
prize were there?
Bài 16:
The area of triangle ABC is 120cm2. On side Ac take point M so that MA =
1
AC. Connect BM, on BM
4
1
BM. Lengthen AG cut BC at N. What’s the:
3
a/ area of triangle ABM?
BN
A
M
b/ the ratio of
NC
take G so that GM=
G
C
N
B
Bài làm:
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