Aptitude Questions Practice Question and Answer
8Q: A dishonest dealer professes to sell his good at cost price, but he uses a weight of 800 gm. For one kg. Find his gain percent? 1906 05d132e47925caa2d5bbbff61
5d132e47925caa2d5bbbff61- 120false
- 225true
- 340false
- 410false
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Answer : 2. "25"
Q: The sum of 3rd and 15th elements of an arithmetic progression is equal to the sum of 6th, 11th and 13th elements of the same progression. Then which element of the series should necessarily be equal to zero ? 1872 15b5cc73ae4d2b4197774f8bf
5b5cc73ae4d2b4197774f8bf- 114th elementfalse
- 29th elementfalse
- 312th elementtrue
- 47th elementfalse
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Answer : 3. "12th element"
Explanation :
Answer: C) 12th element Explanation: If we consider the third term to be ‘x”The 15th term will be (x + 12d)6th term will be (x + 3d)11th term will be (x + 8d) and 13th term will be (x + 10d).Thus, as per the given condition, 2x + 12d = 3x + 21d.Or x + 9d = 0.x + 9d will be the 12th term. Thus, 12th term of the A.P will be zero.
Q: Length of a train is 300 metre. It’s speed is 72 km/hour. In how many seconds it can cross a pole? 1821 05d15fd8e44a3a75f13296b87
5d15fd8e44a3a75f13296b87- 118 secondsfalse
- 215 secondstrue
- 312 secondsfalse
- 420 secondsfalse
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Answer : 2. "15 seconds"
Q: The top and bottom of a tower were seen to be at angles of depression 30° and 60° from the top of a hill of height 100 m. Find the height of the tower ? 1808 15b5cc72ce4d2b4197774f79c
5b5cc72ce4d2b4197774f79c- 142.2 mtsfalse
- 233.45 mtsfalse
- 366.6 mtstrue
- 458.78 mtsfalse
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Answer : 3. "66.6 mts"
Explanation :
Answer: C) 66.6 mts Explanation: From above diagramAC represents the hill and DE represents the tower Given that AC = 100 m angleXAD = angleADB = 30° (∵ AX || BD ) angleXAE = angleAEC = 60° (∵ AX || CE) Let DE = h Then, BC = DE = h, AB = (100-h) (∵ AC=100 and BC = h), BD = CE tan 60°=AC/CE => √3 = 100/CE =>CE = 100/√3 ----- (1) tan 30° = AB/BD => 1/√3 = 100−h/BD => BD = 100−h(√3)∵ BD = CE and Substitute the value of CE from equation 1 100/√3 = 100−h(√3) => h = 66.66 mts The height of the tower = 66.66 mts.
Q: A 250 metre long train crosses a pole in 15 seconds. What is its speed in km/hour? 1778 05d15fcbb5fdb2c68495d9dff
5d15fcbb5fdb2c68495d9dff- 190false
- 245false
- 370false
- 4None of thesetrue
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Answer : 4. "None of these"
Q: Find value of log27 +log 8 +log1000log 120 1721 15b5cc7d0e4d2b4197775120e
5b5cc7d0e4d2b4197775120e- 11/2false
- 23/2true
- 32false
- 42/3false
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Answer : 2. "3/2"
Explanation :
Answer: B) 3/2 Explanation: = log 33 + log 23+ log 103log10×3×22 =log33 12+log 23+log 10312log(10×3×22) =12log 33+3 log 2+12 log103log10+log3+log22 =32log 3 + 2 log 2 + log 10log 3 + 2 log 2 + log 10 = 32
Q: The simple interest on a sum of money is $${4\over 9}$$of the principal and the number of years is equal to the rate percent per annum. The rate per annum is : 1715 05cfdfdf770433d6f12b54050
5cfdfdf770433d6f12b54050- 15%false
- 2$$6{2\over3}\%$$true
- 36%false
- 4$$7{1\over5}\%$$false
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Answer : 2. "$$6{2\over3}\%$$"
Q: A shopkeeper earns a profit of shopkeeper earns a profit of 25% after giving a discount of 20%. Find the ratio between the cost price and the marked price. 1714 15d134055d2441c3c5ff90aa4
5d134055d2441c3c5ff90aa4- 125:16false
- 216:25true
- 316:27false
- 427:10false
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