Written Instructions:
For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..
For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.
Leave your answers in the simplest form or correct to two decimal places.
| 1) An alloy consists of 38% copper and 40% zinc and the remaining is nickel.Find the amound of nickle in 13 kg of the alloy. kg Answer:_______________ |
| 2) An alloy consists of 39% copper and 29% zinc and the remaining is nickel.Find the amound of nickle in 15 kg of the alloy. kg Answer:_______________ |
| 3) An alloy consists of 22% copper and 38% zinc and the remaining is nickel.Find the amound of nickle in 19 kg of the alloy. kg Answer:_______________ |
| 4) An alloy consists of 50% copper and 39% zinc and the remaining is nickel.Find the amound of nickle in 21 kg of the alloy. kg Answer:_______________ |
| 5) An alloy consists of 15% copper and 17% zinc and the remaining is nickel.Find the amound of nickle in 17 kg of the alloy. kg Answer:_______________ |
| 6) An alloy consists of 32% copper and 25% zinc and the remaining is nickel.Find the amound of nickle in 19 kg of the alloy. kg Answer:_______________ |
| 7) An alloy consists of 41% copper and 10% zinc and the remaining is nickel.Find the amound of nickle in 13 kg of the alloy. kg Answer:_______________ |
| 8) An alloy consists of 34% copper and 15% zinc and the remaining is nickel.Find the amound of nickle in 19 kg of the alloy. kg Answer:_______________ |
| 9) An alloy consists of 41% copper and 19% zinc and the remaining is nickel.Find the amound of nickle in 11 kg of the alloy. kg Answer:_______________ |
| 10) An alloy consists of 16% copper and 14% zinc and the remaining is nickel.Find the amound of nickle in 25 kg of the alloy. kg Answer:_______________ |
| 1) An alloy consists of 38% copper and 40% zinc and the remaining is nickel.Find the amound of nickle in 13 kg of the alloy. Answer: 2.86kg SOLUTION 1 : Given: Percentage of copper = 38% Percentage of zinc = 40% Percentage of nickle = 100-(38+40) = 100-78 =22% Amount of nickle is 13 kg of the alloy = 22% of 13kg = (22÷100) x 13 = 0.22 x 13 = 2.86 kg |
| 2) An alloy consists of 39% copper and 29% zinc and the remaining is nickel.Find the amound of nickle in 15 kg of the alloy. Answer: 4.8kg SOLUTION 1 : Given: Percentage of copper = 39% Percentage of zinc = 29% Percentage of nickle = 100-(39+29) = 100-68 =32% Amount of nickle is 15 kg of the alloy = 32% of 15kg = (32÷100) x 15 = 0.32 x 15 = 4.8 kg |
| 3) An alloy consists of 22% copper and 38% zinc and the remaining is nickel.Find the amound of nickle in 19 kg of the alloy. Answer: 7.6kg SOLUTION 1 : Given: Percentage of copper = 22% Percentage of zinc = 38% Percentage of nickle = 100-(22+38) = 100-60 =40% Amount of nickle is 19 kg of the alloy = 40% of 19kg = (40÷100) x 19 = 0.4 x 19 = 7.6 kg |
| 4) An alloy consists of 50% copper and 39% zinc and the remaining is nickel.Find the amound of nickle in 21 kg of the alloy. Answer: 2.31kg SOLUTION 1 : Given: Percentage of copper = 50% Percentage of zinc = 39% Percentage of nickle = 100-(50+39) = 100-89 =11% Amount of nickle is 21 kg of the alloy = 11% of 21kg = (11÷100) x 21 = 0.11 x 21 = 2.31 kg |
| 5) An alloy consists of 15% copper and 17% zinc and the remaining is nickel.Find the amound of nickle in 17 kg of the alloy. Answer: 11.56kg SOLUTION 1 : Given: Percentage of copper = 15% Percentage of zinc = 17% Percentage of nickle = 100-(15+17) = 100-32 =68% Amount of nickle is 17 kg of the alloy = 68% of 17kg = (68÷100) x 17 = 0.68 x 17 = 11.56 kg |
| 6) An alloy consists of 32% copper and 25% zinc and the remaining is nickel.Find the amound of nickle in 19 kg of the alloy. Answer: 8.17kg SOLUTION 1 : Given: Percentage of copper = 32% Percentage of zinc = 25% Percentage of nickle = 100-(32+25) = 100-57 =43% Amount of nickle is 19 kg of the alloy = 43% of 19kg = (43÷100) x 19 = 0.43 x 19 = 8.17 kg |
| 7) An alloy consists of 41% copper and 10% zinc and the remaining is nickel.Find the amound of nickle in 13 kg of the alloy. Answer: 6.37kg SOLUTION 1 : Given: Percentage of copper = 41% Percentage of zinc = 10% Percentage of nickle = 100-(41+10) = 100-51 =49% Amount of nickle is 13 kg of the alloy = 49% of 13kg = (49÷100) x 13 = 0.49 x 13 = 6.37 kg |
| 8) An alloy consists of 34% copper and 15% zinc and the remaining is nickel.Find the amound of nickle in 19 kg of the alloy. Answer: 9.69kg SOLUTION 1 : Given: Percentage of copper = 34% Percentage of zinc = 15% Percentage of nickle = 100-(34+15) = 100-49 =51% Amount of nickle is 19 kg of the alloy = 51% of 19kg = (51÷100) x 19 = 0.51 x 19 = 9.69 kg |
| 9) An alloy consists of 41% copper and 19% zinc and the remaining is nickel.Find the amound of nickle in 11 kg of the alloy. Answer: 4.4kg SOLUTION 1 : Given: Percentage of copper = 41% Percentage of zinc = 19% Percentage of nickle = 100-(41+19) = 100-60 =40% Amount of nickle is 11 kg of the alloy = 40% of 11kg = (40÷100) x 11 = 0.4 x 11 = 4.4 kg |
| 10) An alloy consists of 16% copper and 14% zinc and the remaining is nickel.Find the amound of nickle in 25 kg of the alloy. Answer: 17.5kg SOLUTION 1 : Given: Percentage of copper = 16% Percentage of zinc = 14% Percentage of nickle = 100-(16+14) = 100-30 =70% Amount of nickle is 25 kg of the alloy = 70% of 25kg = (70÷100) x 25 = 0.7 x 25 = 17.5 kg |