Number
0.4 x 0.1
0.04
If a = 4 and b = -3, then 5a - 2b = ?
26
A square has side length 9 m. Find its perimeter.
36 m.
Find the mean: 3 9 4 6 8
6
Max has $25 more than Alex, and together they have $85. How much does Max have?
$55
Find 5% of 320 kg
16 kg
Solve:
5x - 2 = 43
x = 9
A rectangle has length 8 m and width 2.5 m. Find it's area.
20 m2
Molly: 6 10 12 13 16 19 20
Edward: 11 12 16 16 18 21 23
What is the difference between Molly's and Edward's range?
2
A pole is to be cut into 20 equal sections. If it takes 1 minute per cut, how long will it take to cut a 20-metre pole?
19 minutes.
Miss Windle surveys 480 students out of the 1200 students at KHS. What percentage did she survey?
40%
Simplify -9c + 4d - 7c - 21d + 5c
-11c - 17d
A triangle has a pair of equal sides with length a cm, and the third side is 21 cm. If it's perimeter is 56 cm, find the value of a.
17.5 cm
10 000 tickets are sold in a lottery. What is the probability of winning if you buy 250 tickets?
Your answer must be simplified.
1/40
My watch loses one minute every hour, while your watch gains one minute every hour. If the both show 12 noon now, when will they again show the same time?
12 midnight
The numbers 1, 2, 3, ..., 11, 12 are arranged in three columns, each of four numbers, so that the sum of each column is the same. Find the sum.
24
7 less than twice a certain number is 19. Find the number.
13
The volume of a square-based prism is 54 cm3. If the length of the edges of the square base are 3 cm, find the height of the prism.
6 cm
A bag contains 7 green discs, 8 red discs, 6 blue discs and 3 yellow discs. If one disc is drawn at random, what is the probability that it will NOT be green or yellow?
Simplify your answer.
7/13
Miss Windle is organising a round-robin tennis tournament for the club. In a round-robin contest each player plays every other player. If there are six players in the tournament, how many matches are to be played?
15
One quarter of a length of rope is cut off and used. Later on, two-thirds of the remainder is cut off and used. It is found that only 15 m remains. How long was the original rope?
60 m
The sum of 3 consecutive odd number is 57. Find the numbers.
17, 19, 21
Find the capacity of a rectangular prism, in litres, with length 40 cm, width 30 cm and height 25 cm.
30 L
The probability that a computer chip is faulty is found to be 3/40. How many faulty chips would you expect to find in a batch of 600 chips?
45
What is the sum of all the digits in the numbers from 1 to 100?
901