ITMC - Lớp 4 ( Đề 9)

Let I, T, M, C be four distinct positive integers such that the sum of them is 10 and I isthe smallest integer in these four integers. Find the maximum value of the expression

(I x T x M x C) + (I x T x M ) + (I x M x C) + (T x C x M ) + (T x M x C) .

• 90

• 91

• 92

• 93

• 94

Wilson plays a game of darts with six darts. On the target shown each circle has a different score. He will get the points that specified in each circle if a dart into the target and will not get score when a dart out of the target. If Wilson gets 51 scores, then what is the least number of darts that he has to throw into the target?

• 5

• 4

• 3

• 2

• 1

Find the value of (12 * 3)

• 
• 
• 3

• 
• 

  Num, Nim and Nuan are 3 runners.

Num runs 140 meters more than Nim.

Nim runs 430 meters more than Nuan.

The total of distance, that run by all of them is 2 kilometers 20 meters.

How many meters of the distance that Num run?

• 926

• 916

• 922

• 906

• 910

The number of students in a class is more than 15 students but less than 40 students.Exactly one fourth of the class knows to play chess.

On a certain day 6 students were absent. From the remaining exactly one tenth knew to play chess.

If among the absentees have n students knew to play chess, then find the sum of all possible values of n.

• 9

• 13

• 16

• 19

• 22

There are 80 boxes, each containing a different number of coins from 1 to 80 coins.

An operation is that we must select at least one box and take the same number of coins from every selected box.  For example, the first of the operation students may select the boxes containing 10 to 30 coinsand remove 10 coins from each of the 21 selected boxes.

Find the smallest number of operations that we have to do so that every coin is taken out of every box. This will make all boxes to be empty.

(a)  

Jack and Jill have to move 16 small boxes and 10 large boxes

The following table shows the time that each person takes to move each type of box.

Both of them start to move the boxes at 9.30 in the morning.

At what time can Jack and Jill finish moving all boxes by spending least time?

Remark : The answer must be written in term of 4-digit number.

 For example,  at time 10.25, the answer is 1025,

at time 11.54, the answer is 1154,

at time 20.00, the answer is 2000,

at time 00.40, the answer is 0040.

• 1010

• 1011

• 1012

• 1013

• 1014

The following bar chart represents the comparison of the scores round TMC1, TMC2, and TMC3 of two students.

Let a represent the difference of the total scores of 3 rounds of the two students and b represent thedifference of the scores of round TMC 1 of the two students. Which one of the following statements is true?

• b is 20 greater than a.

• a is 20 greater than b.

• a is 30 greater than b.

• b is 30 greater than a.

• a and b are equal.

Find the value of 0.013 x 0.197

• 2.561

• 0.002561

• 0.2561

• 0.02561

• 0.0002561

Suppose that the product of 7 different positive integers is equal to

the product 93 x 94 x 95.

What is the maximum possible sum of the 7 integers?

(a)