0% found this document useful (0 votes)
100 views5 pages

Touchstone 1

The document contains a series of mathematical problems and their solutions, ranging from probability and age-related questions to geometry and logical reasoning. It includes various scenarios involving friends, family, and hypothetical situations, with answers provided for each problem. The problems vary in complexity and cover a wide range of topics in mathematics and logic.

Uploaded by

Ranjan Jha
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as TXT, PDF, TXT or read online on Scribd
0% found this document useful (0 votes)
100 views5 pages

Touchstone 1

The document contains a series of mathematical problems and their solutions, ranging from probability and age-related questions to geometry and logical reasoning. It includes various scenarios involving friends, family, and hypothetical situations, with answers provided for each problem. The problems vary in complexity and cover a wide range of topics in mathematics and logic.

Uploaded by

Ranjan Jha
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as TXT, PDF, TXT or read online on Scribd
You are on page 1/ 5

1: There is a toy train that can make 10 musical sounds. It makes 2 musical soun ds after being defective.

What is the probability that same musical sound would be produced 5 times consecutively? ( 1 of _____) ? Answer: 1/2 * 1/2 * 1/2 * 1/2 * 1/2 = 1/32 32 will be the answer. [not got it]2: Peter and Paul are two friends. The sum of their ages is 35 years . Peter is twice as old as Paul was when Peter was as old as Paul is now. What i s the present age of Peter? Answer: 20 years. 3: The ages of two friends is in the ratio 6:5. The sum of their ages is 66.Afte r how many years will the ages be in the ratio 8:7? Answer: 12 years. 4: (There was a long story, I'll cut short it). There are 5 materials to make a perfume: Lilac, Balsalmic, Lemon, Woody and Mimosaic. To make a perfume that is in demand the following conditions are to be followed: Lilac and Balsalmic go to gether. Woody and Mimosaic go together, Woody and Balsalmic never go together. L emon can be added with any material. (Actually they had also mentioned how much amount of one can be added with how much quantity of the other; but that's not n eeded for the question.) All of the following combinations are possible to make a perfume EXCEPT: Balsalmic and Lilac Woody and Lemon Mimosaic and Woody Mimosaic and Lilac Answer: Mimosaic and Lilac. 5: A girl has to make pizza with different toppings. There are 8 different toppi ngs. In how many ways can she make pizzas with 2 different toppings. Answer: 8 * 7 = 56 6: A triangle is made from a rope. The sides of the triangle are 25 cm, 11 cm an d 31 cm. What will be the area of the square made from the same rope? Answer:280.5625 7: What is the distance between the z-intercept from the x-intercept in the equa tion ax+by+cz+d=0. (I do not remember the values of a,b,c,d) 8: An athlete decides to run the same distance in 1/4th less time that she usual ly took. By how much percent will she have to increase her average speed? Answer: 33.33% 9: A horse chases a pony 3 hours after the pony runs. Horse takes 4 hours to rea ch the pony. If the average speed of the horse is 35 kmph, what s the average sp eed of the pony? [not done]10: There is 7 friends (A1,A2,A3....A7).If A1 have to have shake with all with out repeat. How many hand shakes possible? [give up]11: There are two pipes A and B. If A filled 10 liters in a hour B can fills 20 liters in same time. Likewise B can fill 10, 20, 40, 80,160 .if B filled in (1/16) th of a tank in 3 hours, how much time will it take to fill completely ? Answer:7 hours 12: (Keywords): Sports readers,10 tables,4chairs per table, each table has diffe rent number of people then how many tables will left without at least one person ?

Ans : 6 [ may be various ans depend upon options ]13: The ages of two friends is in the ratio 5:6. After how many years will the ages be in the ratio 7:8? Answer: 10 years. 14: What is the distance of the z-intercept from the x-intercept in the equation ax+by+cz+d=0. (I do not remember the values of a,b,c,d) 15: An athlete decides to run the same distance in 1/4th less time that she usua lly took. By how much percent will she have to increase her average speed? Answer: 33.33% 16. A man whose age is 45 yrs has 3 sons named John,jill,jack. He went to a park weekly twice.he loves his sons very much. On a certain day he find # shopkipper s sailing different things. An apple cost 1penny, 2chocalate costs 1penny.& 3 ba nanas cost 1 penny. He has bought equal no. of apple, chocolate & banana for eac h son. If the total amount he invest is 7 penny then how many he has bought from each piece for his son? a)1app,1cho,1 banana b)1 app,2cho,3 banana c)1app,2cho,1banana ans:c 17. A scientist was researching on animal behavior in his lab. He was very inter ested in analyzing the behavior of bear. For some reason he travelled 1mile in n orth direction & reached at north pole.there he saw a bear .he then followed the bear around 1 hr with a speed of 2km/hr in east direction.After that he travell ed in south direction & reached at his lab in2 hrs. Then what is the colour of t he bear? I think ans is white a)white b)black c)gray d)brown ans: white 18. In a particular city there are 100 homes numbered from 1,2,3 ..100. Thecity was build by a builder from chennei. There was 45 shop in the town which was build b y a builder from Mumbai. THE 2nd builder can build the in time as compared to 1s t builder. If the 2nd builder builds in 15 days,then how many 2 s are used by the builder from Chennai in number ing the 100 homes? a)17 b)18 c)19 d) 20 ans:c)19 19.MR dash has 3 sons whose ages are respectively a,b,c. The grandfather has bou ght a cycle for the eldest son, mother has bought a bag for the youngest one whi ch cost Rs150/. The sum of two age of the elder son & one son is 15.The differen ce of age of sons is 3 & 2.Then what is the age of the eldest son? a)10, b)11, c) 12,d)13 ans:a)10 20. We all know that Arya bhatta is the greatest mathematics belongs to india . When his daughter Mayabati was in her teen age he discovered a problem. At that time the age of mayabati is a prime number,let that age is a. After some years h er age becomes b. then Arya Bhatta was able to solve that problem wit the help o f he daughter mayabati. If a-b=5 & product of a& b is 26 then what is the sum of two squares? A)77 b) 45 c)89 d)67 ans :77 21.how many 13 digit numbers are possible by using the digits 1,2,3,4,5 which ar e divisible by 4 if repetition of digits is allowed?

Ans:5 to the power 12 soln: 5to power 11 *52 digit nos 22. (40*40* 40-31*31*31)/(40*40+40*31+31*31)=?a simle calcutation ans:9 23.[confused] x/2y=2a,then 2x/x-2ay=?(some thing like this .very easy ) Ans: 4 24. A big Question describing a story.After that a number is given eg 2880.by wh at if we divide the number it ll become a perfect square? Ans:5 25. 1st a story. Then a simple ratio problem. The question was if the ratio of a ge of two persons is 5:6,sum of present age is 33,then in how many years the rat io of their age becomes 7:8? a)3 b)4 c)5 d)6 Ans:6 26. Mr behera wants to build A house for his wife. In this there are 5 rooms eac h having equal area. The length of each room is 4m,,breadth is 5 m. the height o f the rooms are 2m. if to make a sq meter we need 17 bricks ,then how many brick s are needed to make the floor of a particular room? Ans: 27. A very big story.on Tuesday college parking place have only 4wheelers & bicy cles,total no of wheels was 182,yhen what is the possible no of bicycles? a)20 b 19 c 18 d 17 Ans:there may be 2 ans 19 &17 28. Simple question bt big one on average age.sth like a,b,c weigheted separatel y 1st a,b,c ,then a& b,then b&c ,then c&a at last abc,the last weight was 167,th en what will be the avg weight of the 7 weight? Ans:95.43 29. Arrange the jumbled letters to make a perfect word RGTEI(sth like this). Fin d to which category it belong?(not so easy,I was bt able 2 solve the problem .th e number of the question was 34) A)town b)vegetable c)animal d) bird Ans:tiger from animal 30. 3 persons a,b,c were there A always says truth,B lies on Monday,tusday,& Wed nesday.but C lies on thrusday,Friday & saturday .one day A said that B & C said to A that B said yesterday way one of the days when I lies ,C said that yesterday way on e of the days when I lies too .then which day was that? A) Sunday b) thrusday c) saterday d).Tuesday Ans: thursday 31.a long story & with in it a mathematical series present like 8 6 17 14 35 30 71 _ 143. Ans: 62 32. One man want to build a wall the length and breadth of the wall are 20, 30 r espectively. He need 35 bricks for one square centimeter then how many bricks he need? Ans:l*b*35(no of bricks needed for sqcm) Ans:21,000 33. one person had three children.he has 7 pennis.then how he can distribute the fruits among his child by folloing conditions.

a)he can get one water millon for 1 penny. b)he can get 2 oranges for 1 penny. c)he can get 3 grapes for 1 penny. Ans:1 water millon 2 orange 1 grape 34. 1/3 rd of a number is more 3 than the 1/6th of a number then find the number ? Ans:18 35. In Tnagar many buildings were under residential category.for buildings they number as 1 to 100. For shops, corporation numbered between 150 and 200 only pri me numbers. how many time 6 will appear in building numbering? Ans: For 1 to 10 - 1 six 2 to 20 - 1 six Similarly upto 59 we utilise six, 5 times from 60 to 69 (including 66) - 11 times from 70 to 100 - 3, hence ans = 5+11+3 = 19 Ans:19. 36.[confused] one grand father has 3 grand child.eldest one age is 3 times of th e youngest child age.sum of two youngest child age is more than two of eldest on e age.find the eldest one age? Ans: 15(we can easily predict from options, as we take y as 15) 37.difrence b/w two nubers is 4.and their product is 17.then find the sum of the ir squers? Ans: 70 (By using (x-y)2=x2+y2-2xy) 38.[repeated] I dont remember exactly the question, one logical problem stating the colour of beer? Ans: white. 39.[don't know] find category from following Jumbled letters, parakeet(answer) Ans: bird(category) 40.[repeated] which is the smallest digit when devides the 2880 gives perfect sq ure.? Ans:5(we can easily predict from options, as we devides them with 2880) 41. I don t have any brothers and sisters.by pointing a picture that man said that his father is my fathers son then who is he? Ans:his son. 42. 6 persons standing in queue with different age group, after two years their average age will be 43 and seventh person joined with them. hence the current av erage age has become 45. find the age of seventh person? Solution: Here the question appear as an easy one, but carried a lot of unwanted sentences and unwanted datas(i dint mention above) in exam which may confuse u on solving technique. So now we can compute x from above equation. (x = 41, 6x = 246) Let now we compute y, ((6x+y)/7) = 45, as we have value of x, compute y. Ans: 69 43.The ratio b/w the ages of two pwrsons is 6:5.and sum of there ages is 77 then how many years later there ratio becomes 8:7? Ans: we can easily predict from options(14) 44. Horse started to chase dog as it relieved stable two hrs ago. And horse star ted to ran with average speed 22km/hr, horse crossed 10 mts road and two small p

ounds with depth 3m, and it crossed two small street with 200 mts length. After traveling 6 hrs, 2hrs after sunset it got dog. compute the speed of dog? Ans: As we have speed and travel time of horse, we can get distance travelled by it... Hence d = 22*6 = 132km, Exactly this 132km was travelled by dog in 8 hours (as it started two hours earl ier). Hence speed of dog = 132/8 = 16.5km/hr Ans:16.5km/hr. 45.[till read the prob].six friends go to pizza corner there r 2 types of pizzas .and six different flavors r there they has to select 2 flavors from 6 flavors w hat s chanses to select? Ans:6C2 46.3, 22 , 7, 45, 15, ? , 31 Solution: Here it appear simple, because it arranged in arranged in sequence man ner, but the actual question was some what twist mentioning fibonacci series and more over question was in statements (no numbers).. hence first try to understa nd the question well. here let group alternate terms 3,7,15,31 (3+4 =7, 7+8 =15, 15+16=31) Similarly for second group (22,45,? (22+23 = 45, 45+46 = 91) hence ans is 91. 47.cycles and 4 wheelors problem? Ans: We can easily predict from options 48.some irrivvelent data.in last two lines problem will be there. One man walks certain distance with 5 kmph.and walk back the same Ans: A 49.A and B tanks r there.1/8th of the tank B is filled in 22Hrs.what is time to fill the tank full? Ans: 25hr 50.5 friends went for week end party to Mc donalds restrurent and there they mea sure there weights .some irrrrrrrrrrrrrrrrilevent data.finel measure is 155 kg t hen find the average weight of 5 people? Ans: 155/5=31

notes : total question 50 total solved: unsolved:

You might also like