### Math 10 Chapter 3 - Part A 1. The ratio between two quantities a and b is denoted by ___________. a) a = b b) a.b c) a:b d) axb 2. The length and width of a rectangle is 42cm and 28cm respectively. The ratio between the two quantities is ____________. a) 3x2 b) 3/2 c) 3:2 d) 3.2 3. A relation between two quantities such as decrease in one quantity causes decrease in other quantity or increase in one quantity causes increase in the other quantity in the same ratio is called _________ variation. a) Indirect b) Inverse c) Opposite d) Direct 4. For 39:26::3:x, the value of x is __________. a) 4 b) 2 c) 5 d) 3 5. If x a 1/y2 then xy2 = _________ a) a (constant) b) q (constant) c) K (constant) d) p (constant) 6. If 7/x = x/7 then x = _________ a) 7 b) +7 c) -7 d) +- 7 7. If a:b = c:d then a + b/b = _____________ a) c + cd b) c + d/c c) c + d/d d) c + c/d 8. If x:y :: 7:4 the x | y/ x + y = __________. a) 3/11 b) 2/12 c) 3/13 d) 4/21 9. Circumference and radius of a circle are ________ proportional a) Inversely b) Directly 10. Work done and manpower are ____________proportional. a) Inversely b) Directly 11. If y a x2 and y = 4 when x = 2 then K = __________. a) 3 b) 2 c) 1 d) 5 12. If three quantities are linked in such a way that a:b::b:c then c is called the ________ proportional a) Fourth b) First c) Third d) Second 13. The mean proportional of a2b2 and c2 is ____________. a) +- abc b) -abc c) abc d) +abc 14. The value of x is continued proportion 8, x, 18 is ____________. a) 15 b) 12 c) 13 d) 11 15. If x + y/y = 11/4 the x:y = ___________ a) 7=4 b) 7/4 c) 7:4 d) 7x4 16. If a:b = 2:3 then 2a - b/2a+ b = _________ a) 1/9 b) 1/7 c) 1/5 17. If x2y = K then y a __________. a) 2/x1 b) 1/x1 c) 1/x2 d) 2/x2 18. The shadow of a 32m long tree is 4m. The ratio between the length and its shadow is __________. a) 8.1 b) 8:1 c) 8x1 d) 8/1 19. The two acute angles of a right triangle are in the ration 2:1. if one angle is of 60o then the other angle is __________. a) 30 b) 31 c) 33 d) 32 20. If a:b = c:d then a:c = ____________. a) 20/7 b) 23/23 c) 22/7 d) 21/8

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