1. The average of 14, 11, 8, x, 19 is 13. The value of x is ______ (A) 52 (B) 12 (C) 16 (D) 13 2. Which is the largest among the following ? 3 4 , 5 8 , 9 13 , 5 9 (A) 5 8 (B) 3 4 (C) 5 9 (D) 9 13 3. If 81 = 9, then 0.81 + 0.0081 = ______ (A) 0.99 (B) 9.9 (C) 0.099 (D) 0.0099 4. If a : b = 2 : 3, b : c = 4 : 5, then a : b : c = ______ (A) 4 : 3 : 5 (B) 2 : 4 : 5 (C) 8 : 12 : 15 (D) 8 : 10 : 20 5. If 20% of a number is 140, then 16% of that number is _____ (A) 120 (B) 114 (C) 110 (D) 112 6. 2a+b = 4 8 16, then (a + b)2 = ? (A) 81 (B) 64 (C) 512 (D) 28 7. If by selling an article for ` 360, Ramu gains 20%. Find his cost price. (A) 320 (B) 300 (C) 310 (D) 380 8. Simplify 2.6 · 0.38 · 2.50 0.13 · 0.19 · 0.5 ...