Question
In how much time will a train running with a speed of 72
km/hr cross the second train? Statement I:  The length of the two trains is 80 metres and 100 metres respectively. Statement II:  The speed of the second train is 60 km/hr. For each of the following questions statements I and II are given. Use the data of those statements and then determine which of the following statements is necessary to answer the question:Solution
Since, we do not know the direction in which the two trains are running, we cannot answer the question. Therefore, the statement I and II are not sufficient to answer the question.
More Data Sufficiency Questions
1024 ÷ 16 + 800 ÷ √64 + ? = 200 * 2
√4761 ÷ 23 + √12769 = ? × 58
55.55% of 30000 – 1111 = ? × 1111
- What will come in place of the question mark (?) in the following questions?
25% of 360+40=? - What will come in the place of question mark (?) in the given expression?

(160 × 12 - 13 × 20)/(120 × 2 + 2 × 35 + 2 × 11) = ?
? = √2704 ÷ (25% of 104) + 73
- Evaluate: 195 ÷ 13 × 8 + 220 – 30% of 500