Đề ôn Timo số 2

Find the number of factors for 143.

• 4

• 2

• 3

• 1

The sum of positive numbers A and B is 480. A is 5 times of B. Find the value of A.

• 80

• 420

• 400

• 480

How many 3-digit numbers divisible by 3 with unit digit 5 are there?

• 30

• 28

• 24

• 20

The sum of 5 consecutive numbers is 125. Find the middle number

• 24

• 27

• 26

• 25

The volume of a cube is 27cm³. Find its surface area in cm².

• 54

• 12

• 36

• 18

Given a rectangle with integral side lengths. Its perimeter is 100. What is the minimum
value of its area?

• 50

• 99

• 49

• 25

A pyramid has 1002 vertices, how many faces does this pyramid have?

• 1001

• 501

• 502

• 1002

At most how many lines can be formed by using 18 points on a plane?

• 171

• 153

• 136

• 120

Use all four digits 1, 2, 3 and 4 to form a 4-digit number such that the tens digit and
thousands digit are even while the hundreds digit and units digit are odd. How many
such 4-digit number(s) is / are there?

• 3

• 4

• 1

• 2

How many 2-digit numbers are there such that the number contains digit “2”?

• 18

• 19

• 17

• 20