Find the arithmetic mean of consecutive numbers from 1 to 7.. Find the arithmetic mean of consecutive numbers from 1 to 15.. Find the arithmetic mean of consecutive numbers from 1 to 99.
Trang 1Bài thi số 1: Sắp xếp
Bài thi số 2: Đi tìm kho báu
1 8 liters of oil is filled in the fisrt can; 6 liters of oil is filled in the second can How many liters are there in each can if they are filled equally?
2 Convert:
1 5
century = … years
3 Convert:
1 4
day = … hours
4 Convert:
1 3
day = … hours
5 Convert:
1 2
century = … years
6 Convert:
1 2
day = … hours
7 Convert: 2 hours = …….minutes
8 Convert: 2kg = ………… g
9 Convert: 5kg = …………g
10 How many 2 - digit numbers can you make by using 1; 0; 3; 4?
Trang 211 How many 2 - digit numbers can you make by using 1; 2; 3 and 4?
12 How many 3 - digit numbers can you make by using 1; 2; and 3?
13 Find the arithmetic mean of consecutive numbers from 1 to 7
14 Find the arithmetic mean of consecutive numbers from 1 to 15
15 Find the arithmetic mean of consecutive numbers from 1 to 99
16 Find the arithmetic mean of consecutive numbers from 3 to 11
17 Find the arithmetic mean of consecutive numbers from 5 to 17
18 How many years are there in 4 centuries?
19 If A; B and C are odd numbers such that A < B < C and A + B + C = 23 then the possible greatest value of C is…
20 If a = 10; b = 12 and the average of a, b, c is 17 then c = …
21 If the average of m and 9 is 14 Then m =
22 If the average of three distinct numbers is 18 then the possible greatest value for one of these numbers is
23 The average of 51; 64 and y is 124 Then y =
Trang 325 If the average of y; y + 2 and y + 4 is 12 Then y =
26 There are 8 packs of cookies, each of them weighs 150g There are also 4 packs of candies, each
of them weighs 200g How many kilograms of cookies and candies are there altogether?
27 There are 28, 27, 32 and 37 students in 4 classses 4A, 4B, 4C and 4D respectively What is the average number of students in each class?
28 Write down the greatest even 3 - digit number………
29 Write down the greatest odd 3 - digit number………
Exam 3: Vượt chướng ngại vật
1 56 + 87 = 87 + … The missing number is ………
2 98 + 72 = 72 + … The missing number is ………
3 A fish weighs 1kg700g, a hundle of average weighs 300g How many kilograms do they weigh in
total?
4 Every 2 jackets cost $30 and every 4 coats cost $40 Find the total cost of 8 such jackets and 16
such coats?
5 Find the value of a such that: 115 x 99 = 110 x 99 + 10 x 99 - a x 99
6 Find the value of x such that: x - 3925 = 1527
Trang 48 Find the value of y, if 58 < y < 62 and y is an even number
9 Jenny, Mary and Anna have a total 390 stamps Jenny has 39 stamps more than Anna and Anna
has 45 stamps more than Mary How stamps does Jenny have?
10 If a + b = 279, a < b and there are 13 odd numbers between a and b Then the value of a is
11 In this figure, MNPQ is a square Each its side is 15cm long MGHQ is a rectangle and its width
is 12cm shorter than its length The perimeter of the rectangle GNPH is cm
12 The 20th century starts in 1901 It ends in …
13 The 21st century starts in 2001 It ends in …
Trang 515 The average of five consecutive numbers is 105 Find the greatest number?
16 The average of five numbers is 20 The average of the five numbers is 16 when one of the numbers is changed to 4 What is the original value of the changed number?
17 The average of four numbers is 25 The average of the four numbers is 23 when one of the numbers is changed to 6 What is the original value of the changed number?
18 The average of six numbers is 10 The average of the six numbers is 8 when one of the numbers
is changed to 3 What is the original value of the changed number?
19 The difference of 10999 and the least 3 - digit number is …
20 The difference of 10999 and the least 4 - digit number is …
21 The greatest 3 - digit number is ………
22 The greatest 4 - digit number is ………
23 The last digit of the product 2 x 4 x 6 x … x 78 is
24 The last digit of the product 3 x 5 x 7 x 9 x 11 is
25 The figure below is made up of 4 squares its perimeter is 40cm What is the area of one square?