Number Topic Quetions (4MB1 Edexcel) page2

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31	(Edexcel/Math B/2016/janR/paper01/q1) Showing your working clearly, find the Lowest Common Multiple (LCM) of 24, 180 and 504	2
32	(Edexcel/Math B/2014/jan/paper01/q1) John is travelling from London to Hong Kong. 12.35 Hong Kong dollars are worth 1 UK pound (£). He wants to buy 50 Hong Kong dollars. Calculate how much 50 Hong Kong dollars are worth in UK pounds.	2
33	(Edexcel/Math B/2014/janR/paper01/q12) From an online website, I purchased an electronic gadget from Singapore. The cost of the gadget in Singapore dollars (SGD) was 82 SGD. The total I paid for the gadget and the postage in British pounds (GBP) was 50 GBP. The exchange rate was 1 SGD = 0.5036 GBP. Calculate the cost of the postage in SGD. Give your answer to 2 decimal places	3
34	(Edexcel/Math B/2016/jan/paper01/q11) From an online website, I purchased an electronic gadget from Singapore. The cost of the gadget in Singapore dollars (SGD) was 82 SGD. The total I paid for the gadget and the postage in British pounds (GBP) was 50 GBP. The exchange rate was 1 SGD = 0.5036 GBP. Calculate the cost of the postage in SGD. Give your answer to 2 decimal places	3
35	(Edexcel/Math B/2016/juneR/paper01/q2) Sarah wants to change 385 US dollars into British pounds (£). Given that £1 = 1.54 US dollars, calculate how much she should get for 385 US dollars.	2
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36	(Edexcel/Math B/2014/jan/paper01/q3) The sales tax for a radio is 16% of the cost price. The sales tax is to be increased from 16% to 20% of the cost price. Calculate the percentage increase in the sales tax.	2
37	(Edexcel/Math B/2014/juneR/paper01/q2) Find $33\frac1 3$ % of £37.92	2
38	(Edexcel/Math B/2015/janR/paper01/q10) Express 270m as a percentage of 30 km.	3
39	(Edexcel/Math B/2015/june/paper01/q11) In a country, the number of people who are more than 60 years old is 23% of the population. Of these people who are more than 60 years old, 42% are men. The population of the country is 50 million. Calculate, to the nearest million, the number of women in this country who are more than 60 years old.	3
40	(Edexcel/Math B/2015/june/paper01/q1) Express $22\frac 12$  minutes as a percentage of one hour	2
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41	(Edexcel/Math B/2016/jan/paper01/q7) There is ${0.3}{kg}$ of tin in a sword. This is $15\%$ of the total weight of the sword.  Calculate the total weight, in kg, of the sword.	2
42	(Edexcel/Math B/2016/june/paper01/q3) In 1964 the high jump world record for women was \SI{1.91}{m}. In 1987 it was ${2.09}{m}$. Calculate, to 3 significant figures, the percentage increase in this world record between 1964 and 1987.	2
43	(Edexcel/Math B/2016/june/paper01R/q6) The selling price of a TV is the cost price of the TV plus profit. The profit is $20\%$ of the cost price. The selling price of the TV is \pounds450.   Calculate the cost price of the TV.	2
44	(Edexcel/Math B/2014/jan/paper01/q20) $F$ varies inversely as the square of $r$. When $r = 2$, $F = 20$. Given that $r > 0$, find the value of $r$ when $F = 5$.	4
45	(Edexcel/Math B/2014/jan/paper01R/q21) $y$ varies inversely as the square of $x$. When $x = 4$, $y = 3$. Find the value of $y$ when $x = 8$.	4
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46	(Edexcel/Math B/2014/june/paper01/q16) $y$ varies directly as the cube of $x$. $y = 9$ when $x = 2$. Find the value of $x$ when $y = 72$.	4
47	(Edexcel/Math B/2014/june/paper01R/q23) $y$ varies as the cube of $x$, and $y = 48$ when $x = 4$. Find $x$ when $y = 162$.	2
48	(Edexcel/Math B/2015/jan/paper01/q20) $y$ varies inversely as the square of $x$. When $x = 3$, $y = 28$. Calculate the values of $x$ when $y = 63$.	4
49	(Edexcel/Math B/2015/jan/paper01R/q20) The number of ants in an ant hill is directly proportional to the cube of the height of the hill. There are 20000 ants in a hill that is \SI{20}{cm} high.   Find the number of ants in a hill that is \SI{40}{cm} high.	4
50	(Edexcel/Math B/2016/jan/paper01/q24) The $y$ coordinate of any point on the curve $C$ varies directly as the cube of the $x$ coordinate of that point. The point $A(2, 216)$ lies on $C$. (a)Find an equation for $C$. The $y$ coordinate of the point $B$ on the curve $C$ is $-343$. (b)Calculate the $x$ coordinate of the point $B$.	3 2
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