Quantitative Aptitude Practice Question and Answer
8Q: A duster is of dimension 5x5x7 all in cms, is sinked into a cylindrical vessel of radius 5 cm and height 10 cm. After insertion the level of the water is inccresed by 2.14 cm. Then by what percentage the part of the duster is above the layer ? 1646 05b5cc705e4d2b4197774f216
5b5cc705e4d2b4197774f216- 196 %false
- 24 %true
- 397 %false
- 43 %false
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Answer : 2. "4 %"
Explanation :
Answer: B) 4 % Explanation: Imension of the duster is assumed as 5x5x7 cm3 Volume of the duster below the water layer= volume of water increased= πxrxrxh = 3.14×52×2.14 ≈ 168 cm3 Total volume of the duster = 5×5×7 = 175 cm3 Percentage of the duster part below the layer = 168×100/175 = 96% Percentage of the duster part above the layer = 4%
Q: A sum of Rs. 8,000 is deposited for 3 years at 5% per annum compound interest (compounded annually). The difference of interest for 3 years and 2 years will be 1643 05b5cc695e4d2b4197774c4ec
5b5cc695e4d2b4197774c4ec- 1Rs. 387false
- 2Rs. 441true
- 3Rs. 469false
- 4Rs. 503false
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Answer : 2. "Rs. 441"
Explanation :
Answer: B) Rs. 441 Explanation: Given principal amount = Rs. 8000 Time = 3yrs Rate = 5% C.I for 3 yrs = 8000 x 105100 x 105100 x 105100 - 8000= Rs. 1261 Now, C.I for 2 yrs = 8000 x 105100 x 105100= Rs. 820 Hence, the required difference in C.I is 1261 - 820 = Rs. 441
Q: 36 identical books must be arranged in rows with the same number of books in each row. Each row must contain at least three books and there must be at least three rows. A row is parallel to the front of the room. How many different arrangements are possible ? 1643 05b5cc6cfe4d2b4197774e2f4
5b5cc6cfe4d2b4197774e2f4- 15true
- 26false
- 37false
- 48false
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Answer : 1. "5"
Explanation :
Answer: A) 5 Explanation: The following arrangements satisfy all 3 conditions. Arrangement 1: 3 books in a row; 12 rows. Arrangement 2: 4 books in a row; 9 rows.Arrangement 3: 6 books in a row; 6 rows.Arrangement 4: 9 books in a row; 4 rows.Arrangement 5: 12 books in a row; 3 rows. Therefore, the possible arrangements are 5.
Q: 311, 230, 294, ?, 281, 256 What will come in place of the question mark (?) in the above number series? 1637 05b5cc6bbe4d2b4197774d81b
5b5cc6bbe4d2b4197774d81b- 1240false
- 2245true
- 3244false
- 4246false
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Answer : 2. "245"
Explanation :
Answer: B) 245 Explanation: Given 311 230 294 ? 281 256 311 - (9x9) = 230 230 + (8x8) = 294 294 - (7x7) = 245 245 + (6x6) = 281 281 - (5x5) = 256 Hence, the missing number in the given series is 245.
Q: A goods truck travels from a place at a certain time and at fixed speed. After 6hrs another truck leaves the same place and move in same direction of uniform speed of 90kmph. The truck catches up the goods truck in 4hrs. Find the speed of the goods truck ? 1635 05b5cc745e4d2b4197774f9fe
5b5cc745e4d2b4197774f9fe- 136 kmphtrue
- 232 kmphfalse
- 328 kmphfalse
- 434 kmphfalse
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Answer : 1. "36 kmph"
Explanation :
Answer: A) 36 kmph Explanation: Let the speed of goods truck be 'p' kmphDistance covered by goods truck in 10hrs (4+6) = Distance covered by other truck in 4 hrs. 10p = 4 x 90p = 36kmph.Therefore, the speed of the goods truck is p = 36 kmph.
Q: Find the length of a train if it takes 10 seconds to cross a pole and double of this time to cross a platform of length 200 mts ? 1630 05b5cc6cae4d2b4197774e081
5b5cc6cae4d2b4197774e081- 1180 mtsfalse
- 2190 mtsfalse
- 3200 mtstrue
- 4210 mtsfalse
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Answer : 3. "200 mts"
Explanation :
Answer: C) 200 mts Explanation: Let the length of the train be 'L' mts let the speed of the train be 'S' m/s Given it crosses a pole in 10 sec=> L/S = 10 ......(1)Given it takes 20 sec (double of pole) to cross a platform of length 200 mts => (L + 200)/S = 20 => L/S + 200/S = 20 But from (1) L/S = 10 => 200/S = 20 - 10 => S = 20 m/s Then, from (1) => L = 10 x 20 = 200 mts. Hence, the length of the train = 200 mts.
Q: The price of a car is increased by 25%, by how much percent, must the new price of this car be decreased to restore its original price ? 1629 05b5cc6c5e4d2b4197774dda0
5b5cc6c5e4d2b4197774dda0- 120%true
- 224%false
- 321%false
- 425%false
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Answer : 1. "20%"
Explanation :
Answer: A) 20% Explanation: Suppose that the original price of the car = Rs. x Then new price of the car => (x) + (x ×25/100) = Rs. 5x/4 To restore the original price, the new price must be decreased by 5x/4 − x = x/4 So required percentage =(x/4)/(5x/4) × 100% = 20%
Q: Simplify the following expression? 40% of (244 x ?) = 48 1627 05b5cc6aae4d2b4197774cf5b
5b5cc6aae4d2b4197774cf5b- 124false
- 222false
- 320true
- 418false
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Answer : 3. "20"
Explanation :
Answer: C) 20 Explanation: We know that 40% = 40100 = 25⇒25 x 244 x ? = 48? = 48 x 5 x 42 x 24 = 20