Quantitative Aptitude Practice Question and Answer
8Q: Two bottles contains mixture of milk and water. First bottle contains 64% milk and second bottle contains 26% water. In what ratio these two mixtures are mixed so that new mixture contains 68% milk? 2318 05b5cc626e4d2b4197774b82a
5b5cc626e4d2b4197774b82a- 13 : 2true
- 22 : 1false
- 31 : 2false
- 42 : 3false
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Answer : 1. "3 : 2"
Explanation :
Answer: A) 3 : 2 Explanation: % of milk in first bottle = 64% % of milk in second bottle = 100 - 26 = 74% Now, ATQ 64% 74% 68% 6 4 Hence, by using allegation method, Required ratio = 3 : 2
Q: From a bunch of flowers having 16 red roses and 14 white roses, four flowers have to be selected. In how many different ways can they be selected such that at least one red rose is selected? 2317 05b5cc77ae4d2b41977750165
5b5cc77ae4d2b41977750165- 127405false
- 226584false
- 326585false
- 427404true
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Answer : 4. "27404"
Explanation :
Answer: D) 27404 Explanation: Given total 16 Red roses and 14 White roses = 30 roses Four flowers have to be selected from 30 i.e, C430= 27405 Ways Now, atleast one Red rose is selected i.e, 27405(total) - 1(all four are white roses) = 27404 ways.
Q: If x is a whole number, then x²(x² - 1) is always divisible by ? 2315 05b5cc761e4d2b4197774fd58
5b5cc761e4d2b4197774fd58- 14false
- 28false
- 312true
- 4Nonefalse
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Answer : 3. "12"
Explanation :
Answer: C) 12 Explanation: we can do this by trial and error method. Putting x = 2,we get 2²(2² - 1) = 12.checking with other integers, the above equation always gives a value which is a multiple of 12,So, x²(x² - 1) is always divisible by 12.
Q: What is the probability that a leap year has 53 Saturdays and 52 Sundays ? 2311 05b5cc6dfe4d2b4197774eada
5b5cc6dfe4d2b4197774eada- 11/7true
- 22/7false
- 31/2false
- 43/2false
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Answer : 1. "1/7"
Explanation :
Answer: A) 1/7 Explanation: A leap year has 52 weeks and two daysTotal number of cases = 7Number of favourable cases = 1i.e., {Friday, Saturday} Required Probability = 1/7
Q: A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is : 2310 05b5cc783e4d2b419777501e7
5b5cc783e4d2b419777501e7- 19.5 km/hrfalse
- 210 km/hrtrue
- 310.5 km/hrfalse
- 411 km/hrfalse
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Answer : 2. "10 km/hr"
Explanation :
Answer: B) 10 km/hr Explanation: Man's rate in still water = (15 - 2.5) km/hr = 12.5 km/hr. Therefore, Man's rate against the current = (12.5 - 2.5) = 10 km/hr.
Q: A 250 metre long train crosses a pole in 15 seconds. What is its speed in km/hour? 2307 05d15fcbb5fdb2c68495d9dff
5d15fcbb5fdb2c68495d9dff- 190false
- 245false
- 370false
- 4None of thesetrue
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Answer : 4. "None of these"
Q: In how many ways the letters of the word NUMERICAL can be arranged so that the consonants always occupy the even places ? 2305 05b5cc6cde4d2b4197774e1e0
5b5cc6cde4d2b4197774e1e0- 15!false
- 26!false
- 34!false
- 4Can't determinetrue
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Answer : 4. "Can't determine"
Explanation :
Answer: D) Can't determine Explanation: NUMERICAL has 9 positions in which 2, 4, 6, 8 are even positions. And it contains 5 consonents i.e, N, M, R, C & L. Hence this cannot be done as 5 letters cannot be placed in 4 positions. Therefore, Can't be determined.
Q: Find the Odd One Out? 3 24 186 1008 5040 20160 2304 05b5cc6a8e4d2b4197774ceac
5b5cc6a8e4d2b4197774ceac- 124false
- 220160false
- 3186true
- 45040false
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Answer : 3. "186"
Explanation :
Answer: C) 186 Explanation: The given number series is 3 24 186 1008 5040 20160 Here the given series follows a pattern that, 3 3 x 8 = 24 24 x 7 = 168 not 186 168 x 6 = 1008 1008 x 5 = 5040 5040 x 4 = 20160 Hence the Odd One in the number series is 186.