Question
Among five friends B, C, D, E and F each studies in a
different standard, viz, 2nd, 5th, 8th, 10th and 12th. C studies in a standard which is an even number. D is F’s senior but does not study in 12th standard. Only three students are senior to B. C is senior to B but junior to D. In which standard does F study?Solution
Only three students are senior to B. C is senior to B but junior to D. It means B studies in 5th standard. C studies in a standard which is an even number. C studies either in 8th or 10th standard. D is F’s senior but does not study in 12th standard. D does not study in 12th standard it means D studies in 10th standard. D is F’ senior that means F studies in 2nd standard. E is the one who studies in 12th standard. So, case 2 will get discarded. 
Final arrangement as shown below: 
What approximate value should come in the place of (?) in the following questions?
42.98% of 849 + 18.45% of 1201 ≈ ?(1550.23 ÷ 30.98) + (864.32 ÷ 23.9) + 1724.11 = ?
Find the ratio of the area of an equilateral triangle of side ‘a’ cm to the area of a square having each side equal to ‘a’ cm.
72.8% of (215.69 + 189.38) - 5.97² + (3.01 of 7.8) = ? of (64.02 - 38.95)
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
245.67 + 20.05² + ?³ = √961.89 * 34.02
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
? + 539.76 ÷ 5.4 × 94.80 = 9829.54
(14.98% of 319.99) - 7.998 = √?
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