8th Class Mathematics Related to Competitive Exam Question Bank Arithmetic

  • question_answer
    Match column I with column II and select the correct answer using the code given below the columns:        
    Column I Column II
    (A) The ratio of 3.5 kg to 280 gm is (p) 10.20
    (B) The compound ratio of  3:4,8:15 and 25:28 is (q) 0.05
    (C) 0.35% of a number is equivalent to multiplying it by the number (r) 5:14
    (D) 20% of 30% of 20% of Rs. 850 is (s) 25:2
    (E) Half of 1 percent written  as a decimal is (t) 0.0035

    A)  \[(A)\to p,(B)\to q,(C)\to r,(D)\to t,(E)\to q\]

    B)  \[(A)\to s,(B)\to r,(C)\to p,(D)\to t,(E)\to q\]

    C)  \[(A)\to r,(B)\to s,(C)\to t,(D)\to p,(E)\to q\]

    D)  \[(A)\to s,(B)\to r,(C)\to t,(D)\to p,(E)\to q\] 

    Correct Answer: D

    Solution :

    \[{{v}_{1}}=15\] (B)  \[\frac{3}{4}\times \frac{8}{15}\times \frac{25}{28}=\frac{5}{14}\] (D) \[\frac{20}{100}\times \frac{30}{100}\times \frac{20}{100}\times 850=\frac{1020}{100}\]


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