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- Question
A 300m race is held between two players running 3m/s and 5m/s in swimming pool of 50m long. how many times the two player meet in opposite direction till the faster one completes the race ?
Options- A. 3 times
- B. 4 times
- C. 5 times
- D. 2 times
- Correct Answer
- 3 times
ExplanationLet us assume A is the faster and B is slower, A takes 10s to finish a lap of 50 m, B takes 17s(approx) to finish a lap of 50 m.
So at 11th sec A starts his 2nd lap by the time B will be in between so that is the first time they will meet each other, at 21st sec A starts his 3rd lap by the time B will be coming back to finish his 2nd lap. So that is the second time they meet in opposite. Then at 31st sec A will start his 4th lap by the time B would not even finish 2nd lap as he take 34(2*17) sec to finish 2 laps. So at 35th sec B will start his 3rd lap by the time A will be coming back to finish his 4th lap in the half way so they will meet 3rd time. At 41st sec A will start its fifth lap by the time B will be going to finish 3rd lap in same direction. At 50th second both will complete A's 5th lap and B's 3rd lap. So they will start next lap(A's 6th and B's 4th) from the same point in same direction. And A will finish the race after completing 300m(6*50) total distance and then they wont meet opposite to each other.So totally they met 3 times in opposite direction.
- 1. M and N have children A and B. F is spouse of B. D is child of F. P is son in law of N. K is kid of P. Who is male chiled of M and N ?
Options- A. B
- B. A
- C. None
- D. Can't be determined Discuss
- 2. A family has a man, his wife, their four sons and their wives and one daughter. The family of every son also has 3 sons and one daughter. Find out the total number of female members in the family ?
Options- A. 12
- B. 8
- C. 9
- D. 10 Discuss
- 3. Four persons can cross a bridge in 3,7,13,17 minutes.Only two can cross at a time.Find the minimum time taken by the four to cross the bridge ?
Options- A. 17 minutes
- B. 20 minutes
- C. 34 minutes
- D. 12 minutes Discuss
- 4. Directions: A string of words is fed into a computing machine. It processes the input and gives an output in the following manner: Input: Honesty is the best policy. Step 1: is Honesty the best policy Step 2: is the Honesty best policy Step 3: is the best Honesty policy Step 4: is the best policy Honesty Output: is the best policy Honesty Now, If the input is "A rolling stone gathers no moss", what will be the fifth word in the string after 4 steps?
Options- A. Moss
- B. No
- C. Stone
- D. A Discuss
- 5. I. Class A has a higher enrollment than Class B. II. Class C has a lower enrollment than Class B. III.Class A has a lower enrollment than Class C. If the first two statements are true, the third statement is
Options- A. true
- B. false
- C. uncertain
- D. none Discuss
- 6. A man wears socks of two colours - Black and White. He has altogether 30 black socks and 10 brown socks in a drawer. Supposing he has to take out the socks in the dark, how many must he take out to be sure that he has a matching pair ?
Options- A. 3
- B. 4
- C. 5
- D. 2 Discuss
- 7. Directions: Seven different boxes A, B, C, D, E, F and G of different colours viz., Orange, Pink, Purple, Yellow, Blue, Red and Green are arranged one above the other. The box at the bottom of arrangement is numbered 1, the above box is numbered 2 and so on. B is immediately above E. More than two boxes are above the Orange box. The Yellow box is immediately below A. Only one box is between the Orange box and F. G is immediately above the Red box. Only one box is between B and the Pink box. Only two boxes are between the Pink and the Green box. Only two boxes are between the Yellow box and the Orange box. The Purple box is neither at the top nor at the bottom of the arrangement.B is above Pink box. C is immediately above F. Neither C nor G is a Yellow box. G is not a Orange box. Question: Which combination represents the position of C and its colour?
Options- A. 6-Green
- B. 6-Red
- C. 5-Purple
- D. 7-Blue Discuss
- 8. In an objective competitive exam, a correct answer score 4 marks and on a wrong answer 2 marks are negatively added. A student scores 420 marks from 150 question. How many answers were correct ?
Options- A. 145
- B. 138
- C. 125
- D. 120 Discuss
- 9. One paper is equally folded 35 times, then what is the new thickness of the paper ?
Options- A. T(2^50)
- B. 50T
- C. 2 x 50 T
- D. T/50 Discuss
- 10. Choose the most essential part for the word given below from the following options ? Shoe
Options- A. Lace
- B. Sole
- C. Leather
- D. Walking Discuss
Logic problems
Search Results
Correct Answer: B
Explanation:
Spouse means a person's partner in marriage, it can be male or female.
But given F is spouse of B
And P is Son in law of N
Relation between F and B
Relation between P and A only
and p is male So, A must be female
=> B is male child.
Correct Answer: 10
Explanation:
1) Man's wife. = 1
2) Man's 4 son's wives. = 4
3) Man's daughter. = 1
4) 4 son's has each one daughter. = 4
Therefore, total number of female members in the family = 1+4+1+4 = 10.
Correct Answer: 20 minutes
Explanation:
First send 17 and 7. After 7 minutes, 7 is at finish and 17 needs 10 more minutes to complete his travel. now send 13. After 10 minutes 17 reaches finish and 13 needs 3 more minutes to complete. now send 3. both 3 and 13 reach destination at the same time after 3 minutes. hence the time taken is 7+10+3=20 minutes.
Correct Answer: A
Explanation:
For the input "A rolling stone gathers no moss", the steps followed are:
Step 1: rolling A stone gathers no moss
Step 2: rolling stone A gathers no moss
Step 3: rolling stone gathers A no moss
Step 4: rolling stone gathers no A moss
After 4 steps the fifth word is "A".
Correct Answer: false
Explanation:
From the first two statements, we know that of the three classes, Class A has the highest enrollment, so the third statement must be false.
Correct Answer: 3
Explanation:
Given there are 2 coloured socks, which is black and White
Let suppose 3 is choosen at random
then three conditions arises
1. all are black
2.all are white
3. either it will have 2 black and 1 white or it will have 2 white and 1 black
so in all the conditions as above mentioned we are getting atleast one pair of socks.
So, he must take out 3 to be sure that he has a matching pair.
Correct Answer: 7-Blue
Explanation:
From the given information the arrangement can be done as follows:
Position Box Colour
7 C Blue
6 F Green
5 B Purple
4 E Orange
3 G Pink
2 A Red
1 D Yellow
Correct Answer: 120
Explanation:
let x be the correct answer and y be the wrong answer
so the total number of questions is (x + y) = 150.....(1)
=> 4x - 2y = 420.....(2)
By solving (1) & (2), we get
=> 6x = 720
hence x = 120
Therefore, number of correct answers are 120.
Correct Answer: T(2^50)
Explanation:
Let initial thickness of the paper be 'T'
after first fold it will be '2T' =
after second fold it will be '4T' =
after 50th fold it will be T x (
T)
Correct Answer: Sole
Explanation:
All shoes have a sole of some sort.Not all shoes are made of leather (choice b); nor do they all have laces (choice c).Walking (choice d) is not essential to a shoe.
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