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Science and Technology

 
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Mental Arithmetic 0007   Mixed

 
 
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1. A 3 hour conference uses 6 speakers. How much time will each one get on average ?
 
15 minutes
20 minutes
30 minutes
45 minutes

180 minutes / 6 = 30 minutes
 

 
2. A car costs a dealer $6,775 to buy and he sells it for $10,350. What profit is made?
 
$3,355
$3,575
$3,735
$3,755
 

 
3. How much is a 15% service charge on top of a bill of £84.40?
 
12.06
12.6
12.61
12.66
 

 
4. When will someone born in 1978 celebrate their 53rd birthday?
 
2011
2021
2031
2041
 

 
5. How many 250cc glasses are needed to hold 17.5 litres of water?
 
70
72
76
80

17.5 / 0.25 = 70
 

 
6. How many minutes are there between mid-day on Tuesday and mid-day on Thursday?
 
2008
2080
2800
2880

48 hours x 60
 

 
7. Starting with 48, three sixteenths of items are sold within an hour. How many are left?
 
31
33
36
39

48 x 3/16 = 9, so 48-9 = 39
 

 
8. Three people bank amounts of £35.75, £42.75 and £63.55 respectively. What is the total?
 
132.05
138.35
141.55
142.05
 

 
9. What is the cost of 120 chocolate bars at 31 pence each?
 
31.4
37.2
39.6
42

120 x 0.31
 

 
10. An invoice must be paid exactly 30 days after 25th March - when will that be?
 
20th April
24th April
28th April
1st May
 

 
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