Multiple Choice Questions (MCQs) Question 1: Solution : (d) We have, 20% of 700 m = \(\frac { 20 }{ 100 }\) x 700 = 20 x 7 = 140 mHence, 20% of 700 m is 140 m. Question 2:
Solution : Money left with her = 136000 -13600= Rs 122400 Question 3:
Solution : Or check out our percentage off calculator here. Question 4:
Solution : Note: To convert any number into per cent, we multiply that number by 100 along with the symbol ‘%’ Question 5:
Solution : Question 6: Solution : Question 7:
Solution : In percentage, \(\frac { 52 }{ 10 }\) x 100% = 520% Question 8:
Solution : In percentage, \(\frac { 3 }{ 8 }\) x 100% = 37.5% Question 9:
Solution : Note: The sign of percentage (%) is removed dividing the number by 100. Question 10:
Solution :
Question 11: Solution : Question 12: Solution : Question 13:
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Question 14: Solution : Question 15: Solution : Question 16: Solution : Question 17: Solution : Question 18: Solution : Question 19: Solution : Question 20: Solution : Question 21: Solution : Question 22: Solution : Question 23: Solution : Fill in the Blanks In questions 24 to 59, fill in the blanks to make the statements true. Question 24: Question 25: Question 26: Question 27: Question 28: Question 29: Question 30: Question 31: Question 32: So, the number of students present on that day, was 46. Question 33: So, the number of students present on that day, was 46. Question 34: Question 35: ∴ Balance in the account = 1500 – 600 = Rs 900 Question 36: Question 37: Hence, cost price of the bat is Rs 83. Question 38: = 120- \(\frac { 20 }{ 100 }\) x 120= 120-24=Rs 96 100 Question 39: Hence, the selling price of the cow is Rs 8100. Question 40: Question 41: Question 42: Question 43: Question 44: Question 45: Question 46: Question 47: Question 48: Question 49: Question 50: Question 51: Question 52: Question 53: Question 54: Solution : Question 55: Question 56: Question 57: Hence, when converted into percentage, the value of 6.5 is more than 100%. In questions 68 and 59, copy each number line. Fill in the blanks, so that each mark on the number line is labelled with a per cent, a fraction and a decimal. Write all fractions in lowest terms. Question 58: Solution : Question 59: Solution : True/False In questions 60 to 79, state whether the statements are True or False. Question 60: Solution : Question 61: Hence, when an improper fraction is converted into percentage, then the answer is always greater than 100. Question 62:
Question 63: Question 64:
Solution : We can also write it as,SI = \(\frac { TXPXR }{ 100 }\) [since, multiplication is commutative] Question 65: Question 66: Question 67: Hence, Ankita got 56% marks. Question 68: Hence, 0.018 is equivalent to 1.8% Question 69: Hence, 50% of Rs 50 is Rs 25. Question 70: Question 71: Hence, 79% of students did not go for picnic. Question 72: Question 73: Question 74: Question 75: Question 76: Question 77: Question 78: Question 79: Question 80: Solution : Question 81: Solution : Question 82: Question 83: Question 84: Question 85: Question 86: Question 87: Question 88: Question 89: Solution : Question 90: Question 91: Question 92: Question 93: Question 94: Question 95: Question 96: Question 97: Question 98: Question 99: Question 100: Hence, 15% of the population of a town are children. Question 101: Hence, number of boys in school is 1200. Question 102:
Question 103: Hence, weight of lime in mortar is 96 kg. Question 104: Question 105: Question 106: Question 107: Question 108:
Question 109: Question 110: Question 111: Question 112: Question 113:
Question 114: Question 115: Question 116: Solution : Question 117: (b) Physical Science Application Unequal masses will not balance on a fulcrum, if they are at equal distance from it, one side will go up and the other side will go down. Unequal masses will balance when the following proportion is true. The child on the left and child on the right are balanced. What is the mass of the child on the right? (c) Life Science Application A DNA model was built using the scale 2 cm : 0.0000001 mm. If the model of the DNA chain is 17 cm long, what is the length of the actual chain? Solution : Question 118: Find (a) The ratio of consonants to vowels in each of the terms. (b) The percentage of consonants in each of the terms. Solution : Question 119: Question 120: In our given case, student had multiply numerator by 3 and denominator by 4, which is incorrect. Question 121: Question 122:
Question 123: Question 124: Question 125: Question 126: Question 127: Question 128: Question 129: Solution : Question 130: Question 131:
Question 132: Question 133: Question 134: Question 135: Question 136:
Following is an example to design your own healthy diet. Solution : Question 137: Question 138: (a) What are the mean, median and mode of the areas listed? (b) How many times the size of the Gobi Desert is the Namib Desert? (c) What percentage of the deserts listed are in Asia? (d) What percentage of the total area of the deserts listed is in Asia? Solution : Question 139: Solution : Question 140: Solution : NCERT Exemplar ProblemsNCERT Exemplar MathsNCERT Exemplar Science |