What is the number of numbers of the form 0.XY, where X and Y are distinct non-zero digits?
72
81
90
100
Since X and Y are distinct non-zero digits - 1 to 9 XY can be arranged in = 9 × 8 ways = 72
For election to the Lok Sabha, a nomination paper can be filed by
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In a month if the seventh day is three days earlier than Saturday,then the nineteenth day of the month will be a
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Which among the following events happened earliest ?
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An 80-litre solution of alcohol and water has 75% alcohol. How much water (in litres) must be added to bring down the concentration of alcohol to 60%?
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