Averages
Find the mean of 4, 6 and 8.
6
Calculate 7 × 8.
56
Continue the sequence: 4, 7, 10, 13, __
16
Round 6.47 to 1 decimal place.
6.5
A book costs 25,000 VND. Mai buys 3 books. How much does she spend?
75,000 VND
Find the median of: 3, 9, 5, 7, 4.
5
Calculate 3.6 × 5.
18
The sequence is 5, 9, 13, 17... What is the 6th term?
25
Round 12.786 to 2 decimal places.
12.79
The temperature is −4°C. It rises by 9°C. What is the new temperature?
5°C
Find the mean of: 8, 12, 7, 9, 14.
10
Calculate 24 × 1.5.
36
A sequence begins 7, 12, 17, 22... Write the term-to-term rule.
Add 5
A number rounds to 8.4 to 1 decimal place. Give one possible number.
8.36
A giraffe is 5 times taller than a penguin. The penguin is 0.9 m tall. How tall is the giraffe?
4.5 m
Four numbers have a mean of 12. Three numbers are 8, 11 and 14. What is the missing number?
15
Work out 2.4 × 1.3.
3.12
The nth term is 4n + 2. What is the 10th term?
42
A number rounds to 6.35 to 2 decimal places. Give the smallest possible number with 3 decimal places.
6.345
A class has 24 students. ¾ bring lunch from home. How many students bring lunch from home?
18 students
Five numbers have a mean of 18. Four are 12, 17, 19 and 21. Find the fifth number.
21
A number multiplied by 2.5 gives 37.5. What is the number?
15
A sequence is 6, 11, 16, 21... Find the 20th term.
101
A number with exactly 3 decimal places rounds to 7.26 to 2 d.p. What is the greatest possible number?
7.264
A shop reduces a 480,000 VND bag by 25%. What is the new price?
360,000 VND