[PP Sub Inspector 17 Aug 2021]
1. If q > 0, and x2 + 13x + q = 0 has integer roots, then how many integer values can 'q' take?
5
7
8
6
2. There is 60% increase in an amount in 6 years at simple interest. What will be the compound interest of ₹240000 after 3 years at the same rate?
₹ 70440
₹ 74940
₹ 89440
₹ 79440
3. Which digits should come in the place of @ and #, respectively, if the number 54264@# is divisible by both 8 and 5 ?
5, 0
2, 0
4, 0
6, 0
4. If \({x \over y} = {7 \over 8} \), then find the value of \({x^2 + y^2} \over {x^2 - y^2}\)
15
1
\(15 \over 113\)
\(-113 \over 15\)
5. Two trains are coming towards each other from opposite directions and the front of the two trains are currerntly at the same level. One has a speed of 10 m/s and a length of 120 m and the second has a speed of 15 m/s and a length of 100 m. How much time will it take them to cross each other?
9.1 sec
8.8 sec
8.9 sec
9.0 sec