According to the pattern shown below, how many triangle(s) is/are there from the 1st to the 500th symbol counting from the left?

(a)  

It requires 12 minutes to cut a piece of wood into 5 sections. If the time required to cut into each section is the same, how many minute(s) is/are required to cut into 23 sections?

(a)  

Today is Sunday. Which day of the week will 1002 days be later?

(a)  

Andy's grandfather's age this year adds 7, is divided by 5 , minuses 2 and multiples 7. The result will be 91 years old. How old is Andy's grandfather this year?

(a)  

Find the value of 48÷1+48÷2+48÷3

(a)  

Find the value of 3-6+9-12+15-18+21-24+27-30+33-36+39.

(a)  

Find the value of 11+14+17+20+23+26+29+32+35+38.

(a)  

Find the value of 123x23+246x20+37x123.

(a)  

Find the value of 11x111x1111.

(a)  

What is the smallest 4-digit number that can be divisible by 4 and 6?

(a)  

Find the digit of A if

(a)  

Define the operation symbol a*b = (a+b) x (a-b), find the value (145*135).

(a)  

The product of positive numbers A and B is 363. A is 3 times of B. Find the value of A.

(a)  

If a 9 digit number 20181013A is divisible by 18, find the value of A.

(a)  

How many rectangle(s) with "*" is/are there in the figure below?

(a)  

It is known as the lengths of shorter sides for a right-angled triangle are 5cm and 12cm respectively. Find the length of the longest length.

(a)  

The area of a rectangle is 80cm². If the sides of the rectangle are integers, how many different value(s) of the perimeter of this rectangle is/are there?

(a)  

A big squared is formed by 25 squares with side length 7cm. How many cm is the perimeter of big square?

(a)  

How many right-angled triangles(s) is/are there in the figure below?

(a)  

Find the smallest difference by using all 8 digits from 0 to 7 without repetition to form two 4-digit numbers.

(a)  

It is given that the total weight of 3 apples and 3 oranges is 600g. The weight of an apple is the same as that of 3 oranges. What is the weight of 1 apple.

(a)  

It requires 10 people to take 8 days to complete a task. How many day(s) is/are needed for 16 people to finish the same task?

(a)  

There are a total of 14 chickens and rabbits in a farm. The animals have a total of 32 legs. How many rabbit(s) is/are there?

(a)  

How many 2-digit number(s) is/are there such that the number contains digit "8"?

(a)