LASCO MATHS
CHALLENGE
2014
Quiz 5
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1 Alana sells bracelets every day in the centre of Cochabamba. She sells a mean of 12
bracelets a day for the first six days of the week. On the seventh day her mean
number for every day of the week drops to eleven. How many did she sell on the
seventh day?
2 Alejandro gets paid 3 pesos for each car he washes and 5 pesos for each van he
washes.
If he earns 48 pesos in total and he washes more vans than cars, how many cars did
he wash?
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3 Benicio and Juan play with three dice on the street
Suggest three numbers you could roll on the dice which would give the same score if
you added or multiplied the three numbers.
4 Jorge fishes for a living on Lake Titicaca.
He gives two ninths of this catch to his mother at the lakeside and then three eighths
of what he has left to his brother Juan at Puno Train Station. He then freezes 70% of
what he has left. If this leaves him with 21 fish to sell, how many did he catch?
5 Use the periodic table to crack the code.
Work out the name of the city. Your answer will be the name of the country that
contains this city.
33
92
7 6
53
8
7
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6 Use the map of South America to answer the question below
Map question
X = number of countries smaller than Paraguay
Y = number of countries that border Brazil, but not Peru.
P = number of countries that have only 2 vowels in their name.
Q = number of countries that do not touch the sea.
R = number of countries whose capital city has a population of more than 1 million
Work out the value of
(PR + X + Y) 1/Q
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7 Bernardino builds a pen for his pet vicuna. He keeps his pet alpaca tethered to a
rope outside the pen at point A. If the rope is 4m long, what area of ground can be
covered by both the alpaca and the vicuna?
Country
Argentina
Bolivia
Brazil
Chile
Colombia
Ecuador
French Guiana
Guyana
Paraguay
Peru
Suriname
Uruguay
Venezuela
Area in km2
2,766,890
1,098,580
8,514,877
756,950
1,138,910
283,560
91,000
214,999
406,750
1,285,220
163,270
176,220
916,445
Population
40,482,000
9,863,000
191,241,714
16,928,873
45,928,970
14,573,101
221,500
772,298
6,831,306
29,132,013
472,000
3,477,780
26,814,843
8 Multiply the number of countries with an area of 1 million km2 (if measured to
the nearest million) by the number of countries with a population of 10 million (if
measured to the nearest 10 million)?
See optional bonus task.
© F Schlindwein MMXIV