Math Is Fun
0.00435 written in standard form is ___________
4.35 x 10-3
If p/5 = 20, then p =
100
A dress bought for $60 and is sold to make a profit of 20%. What is the selling price?
$72
How many millimeters are in 55 cm?
550 mm
What is the value of the digit 3 in the number 2341 ?
300
The number 32747 written to 4 significant figures is
32750
Simplify the following
5x – 2y – 3x + 2y
2x
An item was bought for $125 was sold for $175. What is the percentage profit?
40 %
Travis left for school at 7:42 am and arrived at 8:37 am. How long did it take Travis to get to school?
55 minutes
If the Universal set U = {1,2,3,4,5,6} and H = {3,4,6} then H’ =
H’ = {1,2,5}
The decimal equivalent of 7/8 is
0.875
“y is equal to the square of x” can be written as
y = x2
Ann and Betty shared a sum of money in the ratio 2:3 respectively. Ann received $120. What was Betty’s share?
180
3 800 millimetres expressed in metres is
3.8 metres
- 7 - (-3) =
- 4
The following scores were obtained by eleven footballers in a goal-shoot competition: 5, 3, 6, 8, 7, 8, 3, 11, 6, 3, 2,
What is the modal score?
3
2(y+3x) + 5y - 2(x+5)
7y + 4x – 10
After a 10% discount, an item is sold for $360. What was the price before the discount?
$ 400
The volume, in cm3 of a cube of edge 3 cm is
27 cm3
Which of the fractions below is the greatest?
3/8 , 1/2, 12/16, 7/8
7/8
Three lights flash at intervals of 4, 6 and 10 seconds respectively. They are started together. How soon after will they next flash together again?
60 seconds
If x = 2 and y = -1, then (3x - 5y) / xy2
is
11/2 or 5.5
A man’s basic wage for a 40-hour week is $160.00. He is paid $5.00 per hour for overtime. If he works 6 ½ hours overtime in a certain week, his wage for that week is
$ 192.50
A speed-boat took 9 hours to travel a distance of 1080 km. What was its average speed?
120 km/h
What is the value of x in:
3(2x - 4) = 12
x = 4