Cambridge International Examinations Cambridge Secondary 1 Checkpoint

Transcription

1 Cambridge International Examinations Cambridge Secondary 1 Checkpoint MATHEMATICS 1112/02 Paper 2 October 2015 MARK SCHEME Maximum Mark: 50 IMPORTANT NOTICE Mark Schemes have been issued on the basis of one copy per Assistant examiner and two copies per Team Leader. This document consists of 11 printed pages and 1 blank page. IB15 10_1112_02/4RP UCLES 2015 [Turn over

2 2 Question number 1 1 Saturday ticked stated in explanation and a crect reason, e.g. Mode on Monday is 1 and mode on Saturday is 2 2 is greater than 1 Question number 2 (a) 1 Add 6 (b) 1 83 Question number 3 1 depth of water depth of water time time depth of water depth of water time time UCLES /02/O/N/15

3 3 Question number (000 ) (cm) Question number H F E G Award 1 mark if any 2 of F, G and H are positioned crectly. Question number 6 (a) 1 5y y (b) 1 12w w Question number 7 (a) 1 2 : 3 (b) 1 ($)8 Allow follow through from an increct answer to part (a). UCLES /02/O/N/15 [Turn over

4 4 Question number (%) Question number and of % of 420 Award 1 mark f seen ( 5 2 of 410 =) 164 and (38% of 420 =) Question number (cm) Award 1 mark f sight of π π 4.3 UCLES /02/O/N/15

5 5 Question number 11 (a) 1 0 l < l < l < l < 4 2 (b) 1 Draws a complete and crect frequency diagram. Do not award mark f a diagram which has gaps between the bars. Allow follow through from their frequencies. (c) 1 True False True False Total 3 Question number 12 2 (B) C ( kite) D ( parallelogram) A ( rectangle) E ( square) Award 1 mark f at least 2 crect answers. Question number 13 1 ( n5) equivalent. 7 UCLES /02/O/N/15 [Turn over

6 6 Question number 14 1 (0).429 (hectares) Question number 15 2 (2, 1) Award 1 mark f each of the codinates. Award 1 mark f both values crect but increct notation used e.g. (x2, y-1) (x =2, y = -1) Question number Award 1 mark f each. Question number UCLES /02/O/N/15

7 7 Question number (cm 3 ) Award 2 marks f a complete crect method, e.g [(7 8) + (5 3)] 5 [(8 4) + (13 3)] [ ] 5 Total 3 Award 1 mark f sight of any of these calculations answers in brackets: (= 71) (= 71) (= 280) (= 160) (= 75) (= 195) (= 455) (= 100) Question number UCLES /02/O/N/15 [Turn over

8 8 Question number 20 (a) 1 Negative (crelation) (b) 1 Indicates Graph A and gives a crect reason, e.g. Babies generally get heavier as they get older Older babies weigh me Mass and age of babies will be positively crelated (and Graph A shows positive crelation) Question number UCLES /02/O/N/15

9 9 Question number 22 3 cylinder cuboid jug and (volume of cylinder =) 1178 (cm 3 ) and (volume of cuboid =) 1440 (cm 3 ) Award 2 marks f either 1180 ( better) seen and 1440 seen one of seen with a crect follow through der. Assuming only 1 err Award 1 mark f either 1180 ( better) 1440 seen. Award maximum 1 mark f crect answer with no wking. Total 3 Question number 23 (a) 2 A straight line passing through (0, 3) and (1.5, 0) and extending as far as (-1, 5) and (3, -3). (b) 1 (x) = 2 (y) = -1 Award 1 mark f: any straight line through (0, 3) (1.5, 0) f a line with gradient 2, i.e. parallel to crect line. Follow through from their (a) to the nearest half square if the two lines intersect. Total 3 UCLES /02/O/N/15 [Turn over

10 10 Question number (38...) 56 (litres) F 2 marks accept Award 1 mark f an attempt to find the cost of one litre ($1.42) and divide 80 by that. Award 1 mark f an attempt to find the amount that can be bought f $1 ( litres) and multiply that by 80 Award 1 mark f using proptions e.g. ( ) 38.5 Question number 25 (a) equivalent (b) 1 Team A and (The relative frequencies are) 0.43(75) 0.44 and 0.32(14 ) 7 9 is bigger than UCLES /02/O/N/15

11 11 Question number 26 (a) ( ) (b) ( ) Question number 27 Total 3 3 Supermarket (is cheaper) by ($)1.26 Award 2 marks f sight of any of ($)39.06 ($)37.8(0) and (oe) Crect method with 1 arithmetic err 2.17 and Award 1 mark f ($)37.8(0) seen UCLES /02/O/N/15 [Turn over

12 12 BLANK PAGE UCLES /02/O/N/15