Exam (elaborations) Calculus I MATH 1512 (4)

1. When I divide 48 by the sum of 5 and a certain number, the result is 3. What is the number? (A) 11 (B) 16 (C) 119 (D) 139 2. Evaluate 110112 + 101112 in binary. (A) 1100102 (B) 1011012 (C) 1110112 (D) 1001112 3. Subtract 2478 from 54328 and leave your answer in base 8. (A) 51638 (B) 45658 (C) 34568 (D) 11638 4. Given the 21p = 10112, calculate the value of p. (A) 2 (B) 3 (C) 4 (D) 5 5. The product of a certain number and 7 is equal to twice the number subtracted from 36. Find the number. (A) 2 (B) 3 (C) 4 (D) 5 6. Joel buys 4 rulers and a pencil and these cost the same as 2 rulers and 4 pencils. If a pencil costs N 8, how much does a ruler cost? (A) N10.00 (B) N11.00 (C) N12.00 (D) N13.00 7. Efe can travel 45km in 3 hours using his bicycle. How many kilometres can he travel in 10hours? (A) 120km (B) 150km (C) 155km (D) 160km 8. Calculate the reciprocal of 0.05. (A) (B) (C) 5 (D) 20 9. The sum of 35 and a certain number is divided by 4. The result is equal to double the number. Find the number. (A) 3 (B) 4 (C) 5 (D) 6 10.From the product of 9 and 10, subtract 48; then divide the result by 7. What is your final answer? (A) 5 (B) 6 (C) 7 (D) 8 11. Five workers dig a piece of ground in 8 days. How long will it take 10 workers to do the same work? (A) 10days (B) 8days (C) 5days (D) 4days 12.Convert two to decimal. (A) 187 (B) 178 (C) 718 (D) 127 13. Calculate the simple interest on N30,000 for 4 years at 5% per annum. (A) N 5,000 (B) N 5,600 (C) N 6000 (D) N 6,500 Use the figure below to answer questions 14 and 15. 1000 x y 1480 14. What is the value of y? (A) 320 (B) 420 (C) 480 (D) 500 15. Calculate the value of x. (A) 320 (B) 420 (C) 480 (D) 500 16. Express 0.65 as a fraction. (A) (B) (C) (D) 17. Find the H.C.F of 15, 20 and 35. (A) 2 (B) 3 (C) 4 (D) 5 18.Convert 131four to base ten. (A) 29 (B) 28 (C) 21 (D) 19 19. A dealer bought 1000 articles for N 6000 and sold them at N 9 each. Find his percentage profit. (A) 90% (B) 70% (C) 60% (D) 50% 20. Express 0.0004532 in standard form. (A) 4.532 x 104 (B) 4.532 x 103 (C) 4.532 x 10–3 (D) 4.532 x 10–4 21. Given that 7: y = 21: 6, find the value of y. (A) 2 (B) 6 (C) 16 (D) 24 22. Find the area of a trapezium which has a height 20cm and its parallel sides are 7cm and 8cm long. (A)140cm2 (B) 150cm2 (C) 160cm2 (D) 560cm2 23. The angles of a quadrilateral are 240 , 3x0 , 1200 and 1440 . Find x. (A) 210 (B) 240 (C) 400 (D) 480 24. Find the sum of angles of a hexagon. (A) 1800 (B) 3600 (C) 7200 (D) 9000