Maths Practice Question and Answer
8 Q: The distance between the centers of two circles having radii 4.5 cm. and 3.5 cm. respectively is 10 cm. What is the length of the transverse common tangent of these circles?
1168 060f7d60e16158a5eeda93983
60f7d60e16158a5eeda93983- 16 cmtrue
- 212 cmfalse
- 38 cmfalse
- 47 cmfalse
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Answer : 1. "6 cm "
Q: A boat covers 48 km. upstream and 72 km. downstream in 12 hours, while it covers 72 km. upstream and 48 km. downstream is 13 hours. The speed of stream is -
1296 060f7d5753ca0726dff34f9e6
60f7d5753ca0726dff34f9e6- 12.5 kmphfalse
- 24 kmphfalse
- 32 kmphtrue
- 42.2 kmphfalse
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Answer : 3. "2 kmph"
Q: A sum of money was invested at a certain rate of simple interest for 2 years. Had it been invested at 1% higher rate, it would have fetched Rs.192 more interest. The sum of money is-
1132 160f7d50aef8c4b405cab1ac4
60f7d50aef8c4b405cab1ac4- 1Rs.9000false
- 2Rs.9600true
- 3Rs.7200false
- 4Rs.8400false
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Answer : 2. "Rs.9600"
Q: A trader makes a profit equal to the selling price of 75 articles when he sold 100 of the articles . What % profit did he make in the transaction?
1502 060f7d47d3ca0726dff34f56c
60f7d47d3ca0726dff34f56c- 1300%true
- 2150%false
- 333.33%false
- 475%false
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Answer : 1. "300% "
Q: Anoop travels first 1/3 of the total distance at the speed of 10 km/hr. and the next 1/3 distance at the speed of 20 km/hr. and the last 1/3 distance at the speed of 60 km/hr. The average speed of Anoop is-
5442 060f7d41d5ae2256f5e7fb4c2
60f7d41d5ae2256f5e7fb4c2- 118true
- 221false
- 314false
- 416false
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Answer : 1. "18 "
Q: 1 + 2 + 3 + ............. + 49 + 50 + 49 + 48 + ........+ 3 + 2 + 1 is equal to -
2085 060f7d3cb3ca0726dff34f09b
60f7d3cb3ca0726dff34f09b- 12550false
- 22380false
- 32500true
- 42400false
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Answer : 3. "2500 "
Q: Smallest prime number greater than 200? 2885 05b5cc607e4d2b4197774b519
5b5cc607e4d2b4197774b519- 1201false
- 2205false
- 3211true
- 4203false
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Answer : 3. "211"
Explanation :
Answer: C) 211 Explanation: From the trial and error method of division, 201 is divisible by 3 205 is divisible by 5 203 is divisible by 7 Hence, after eliminating three options, remained is 211 and is divisible by only 1 and itself. Therefore, 211 is the smallest prime number greater than 200.
Q: A 200 m long train passes a motorcycler, running in the same direction at 12 km/hr, in 15 second and a jeep travelling in the same direction in 20 s. At what speed is the car travelling (length of both the motorcycler and jeep is negligible)? 3357 05b5cc607e4d2b4197774b502
5b5cc607e4d2b4197774b502- 136 kmphfalse
- 232 kmphfalse
- 329 kmphfalse
- 424 kmphtrue
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Answer : 4. "24 kmph"
Explanation :
Answer: D) 24 kmph Explanation: Let the speed of the train be 'S' kmph From the given data, Distance = Length of train = D = 200 mts = 200 x 18/5 kms Time = 10 sec given speed of the motorcycler = 12 kmph Relative speed as they are moving in the same direction = (S - 12) kmph (S- 12) = 200 x 18515S - 12 = 48S = 60 kmph Hence, the speed of the train = S = 60 kmph Now, Let the speed of the jeep be 'x' kmph 60 - x = 200 x 1852060 - x = 36x = 60 - 36x = 24 kmph Therefore, the speed of the jeep = x = 24 kmph.