2017 SNGS Sec 4 EM Prelim P1 Answer Key

2017 OP MA P1 – Answer Key 1. 7 3x 21. (i) (a) r2 (i)(b) 2886.0 r (ii) 11.1 cm2 2. )1)(1)(23(  xxba 3. 83  x 4. $1645 22(a)(i) ଻ ଵ଼ (ii) ହ ଽ (b)(i) ଵ ସ (ii) ଻ ଼ 5. (a) 4 3a (b) 8.82 or 8.8 or 9 6. 2)2(2 23   t t 7. (a) 0.571 (b) 0.0113 8. (i) 19846 (ii) 3210 9. 10. 64x 11. 7h 19 mins 12. (a) x = 7 (b) parallelogram 13. (a) 900 (b) 2160 14. (a) 732 43 x (b) 21k (c) 1512 , 567 15. (a) 24 (b) 25 : 16 16. (a) 77.4o (b) 22.4 17. (a) 174 (b) 4.942 18. (a) $22.50 (b) P = 0.88(0.8U + 0.9V ) 19. (b)(i) S(4,  2) (ii) = 41 units2 R S  C A B

20. (a)       514 423 (b)        286 076 (c) $2 (d) $68.40