PERCENTAGES
I share an extra large pizza with my friend for lunch. I eat 3/5 of it, and he eats 3/10. What percentage of the pizza is left?
10%
The population of the village increased from 234 to 275 during one year. Find the percentage increase
17.52%
John covers a distance of 400 meters in 50 seconds. What is his average speed in meters per second?
8 m/s
Sarah plans to watch a movie that has a duration of 2 hours and 40 minutes. If she wants to finish the movie by 9:45 PM, at what time should she start watching it?
7:05 PM
Next number in the series: 32, 45, 60, 77, ?
96
A shopkeeper decides to increase some prices by 10%. By how much would she increase the price of:
a. 90
b. 2
By a. 9 b. 0.2
Richard and Debbie cancel their holiday at short notice. The travel agents refund 65% of the £420 they had paid. How much money do Richard and Debbie lose?
189
Lisa's flight departs from New York at 6:45 PM Eastern Standard Time (EST) and arrives in Paris after an 8-hour flight. If Paris is 6 hours ahead of New York, what time does Lisa's flight arrive in Paris local time?
8:45 am local time
A high-speed train departs from Station A at 8:00 AM and arrives at Station B after a 4-hour and 20-minute journey. What time does the train arrive at Station B?
12:20 PM
What is the longest side of the right-angle triangle called?
Hypotenuse
When a beaker of sand is dried in a hot oven its mass reduces from 450 grams to 320 grams. Find the percentage reduction in its mass
28.9%
The size of the school increased so that it had 750 pupils instead of 680 and 38 teachers instead of 37. Find the percentage increases in the number of teachers and pupils. Comment on your answers.
10.29% pupils 2.7% teachers
Sarah bakes a cake that needs to be in the oven for 1 hour and 20 minutes. If she puts the cake in the oven at 3:45 PM, at what time should she take it out?
5:05 pm
Lisa's flight departs from New York at 9:45 PM Eastern Standard Time (EST) and arrives in Dubai after a 14-hour flight. If Dubai is 9 hours ahead of EST, what time does Lisa's flight arrive in Dubai local time?
12:45 pm Dubai
Which number is a ‘magic number’?
Number ‘9’ is considered as a magic number, as the sum of the digits of the multiples of 9, is always 9. For example; (18) 8 + 1 = 9, (54) 5 + 4 = 9, (81) 8 + 1 = 9.
John buys calculators for £5 each and then sells them to other students for £6.90. Find his percentage profit
38%
A new gas supplier offers a 20% discount on the normal price and a further 5% discount if customers pay directly from their banks. For one household the gas bill is normally £100. Find out how much they have to pay after both discounts.
76
Lisa catches a train that departs at 7:15 AM and arrives at her destination after a 2-hour and 45-minute journey. What time does the train arrive at her destination?
10:00 am
David's flight departs from Los Angeles at 11:15 PM Pacific Standard Time (PST) and arrives in Sydney after a 16-hour flight. If Sydney is 19 hours ahead of PST, what time does David's flight arrive in Sydney local time?
Sydney 6:15 pm
An angle more than 180 and less than 360
Reflex angle
A battery was tested and found to power a cassette player for 12 hours. An improved version of the battery-powered the cassette player for an extra 30 minutes. Find the percentage increase in the life of the batteries
4.167%
The usual price of a television set is £298 plus VAT at 17.5%. What is the usual price?
350.15
David's flight departs from Los Angeles at 10:30 PM Pacific Standard Time (PST) and arrives in Tokyo after a 12-hour flight. If Tokyo is 17 hours ahead of PST, what time does David's flight arrive in Tokyo local time?
5:30 pm local time
Lisa catches a train that departs at 6:30 AM and arrives at her destination after a 3-hour and 40-minute journey. What time does the train arrive at her destination?
10:10 am
What number do you get when you divide the circumference of a circle by its diameter?
PI = 3.142