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Mathematics

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  • One side
    angle_incline One side is 36 long with a 15° incline. What is the height at the end of that side?
  • Examination 2
    test In an examination, a teacher awards 2 marks for every correct answer and subtract a mark for every wrong answer. If there are 20 questions and a child scored 25 marks how many correct answer did the child get?
  • Six te 2
    eq1 If 3t-7=5t, then 6t=
  • Steps 6
    steps Going up to his room will take 7 steps up to the landing. Another 9 steps to reach his room. How many steps all in all?
  • 80 students
    venn_intersect 80 students were asked what type of test they preferred. 50 students said they liked multiple choice and 42 liked true or false. If 36 liked both multiple choice and true or false types, how many students preferred multiple choice only?
  • Intersect and conjuction
    venn_intersect Let U={1,2,3,4,5,6} A={1,3,5} B={2,4,6} C={3,6} Find the following. 1. )AUB 2. )A'UB'
  • Car repair
    cars John bought a car for a certain sum of money. He spent 10% of the cost to repairs and sold the car for a profit of Rs. 11000. How much did he spend on repairs if he made a profit of 20%?

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