Math competition

Round off the number 0.0029999 to 3 significant figures.

• 0.003

• 0.0030

• 0.00300

• 0.003000

(-2.5) - (+1.7) - (-0.8) =？

• -5

• -3.4

• -1.6

• 1.6

In the figure, the 1st pattern consists of 4 dots. For any positive integer n, the (n+1)th pattern is formed by adding 2 dots to the nth pattern. Find the number of dots in the 8th pattern.

• 14

• 16

• 18

• 20

Factory P produced 1048 smartphones in 4 hours. Factory Q produced 1764 smartphones in 6 hours.

Which factory has a faster produce rate?

                                                   

• Factory P

• Factory Q

• They have the same production rate.

• It cannot be determine.

Simplify the following expression.

Which of the following statements is/are correct?

• II only

• III only

• I and III only

• I, II amd III

According to the cumulative frequency polygon below, the 75th percentile of the data is

How many positive integers satisfying the following inequality?

If the weight of a bag of rice is measured as 8 kg correct to the nearest 0.5 kg, what is the lower limit of the actual weight of the bag of rice?

• 7.5

• 7.75

• 8

• 8.5

It is given that AB is a vertical line and the coordinates of A are (-3, -6). If the length of AB is 10 units, write down ALL possible y-coordinates of B.