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3.Which one of the following numbers is a perfect square?(a) 20 (b) 40 (c) 80 (d) 902. The square of is 10(a) 10 (b) 20 (c) 50 (d) 100The unit digit of the square number 81 is(a) 0 (b) 1 (c)2 (d) 3Which of the following are in inverse proportion?a) The time taken for a journey and the distance travelled inuniform speed.b) The population of a country and the area of land per persoc) Area of cultivated land and the crop harvested.4 |
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