TestFunda Answers - Modern Maths

[shahul]

TFAnswers >> Quantitative Ability >> Modern Maths

Question # 13428

There was a grand mother in a village who had a grand child.Upon asking her grand childs age she told that she is as older as many days old as her daughters age in weeks and as many days as her own age in years.The sum of the three is 130.then how old is the child.?

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[sumit2goody]

TFAnswers >> Quantitative Ability >> Modern Maths

Solution to Question # 13428

Already answered previously. Please check the answered section for detailed solution

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[Elakiya]

TFAnswers >> Quantitative Ability >> Modern Maths

Question # 13430

A person travels through 5 cities - A, B, C, D, E. Cities E is 2 km west of D. D is 3 km north-east of A. C is 5km north of B and 4 km west of A. If this person visits these cities in the sequence B - C - A - E - D, what is the effective distance between cities B and D?

Options

1)  13 2)  9 3)  10 4)  11

Additional Notes: xpln me...

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[ajay_h]

TFAnswers >> Quantitative Ability >> Modern Maths

Solution to Question # 13430

13,

BC+AC+ED =  11

Think of AED as triangle, so AE should be greater than 1 and less then 5.

 

Only 13 satisfies this condition.

13,
BC+AC+ED =  11
Think of AED as triangle, so AE should be greater than 1 and less then 5.
Only 13 satisfies this condition.

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[v.aruna]

TFAnswers >> Quantitative Ability >> Modern Maths

Question # 13432

a hare and tortoise have a race along a circle of 100 yards diameter.the tortoise goes in one direction while the hare in another direction.the hare stars afer the tortoise had cuvered 1/5of its distance and that too liesurely.the hare and tortoise meet when the hare hs covered 1/8 of the distance.ry what factor should the hare increase its speed so as to tie the race?

Options

1)  8 2)  40 3)  5 4)  37.80

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[sumit2goody]

TFAnswers >> Quantitative Ability >> Modern Maths

Solution to Question # 13430

13,
BC+AC+ED =  11
Think of AED as triangle, so AE should be greater than 1 and less then 5 as in a triangle 3rd side < sum of two sides and > difference of two sides 
Only 13 satisfies this condition.

hence option 1 

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[sumit2goody]

TFAnswers >> Quantitative Ability >> Modern Maths

Solution to Question # 13432

The answer is 37.80 
Diameter of the circle is 100 yards so circumference is 314 yards(using pi=3.14)
Let the speed of tortoise and hare is x and y respectively
in the same interval the hare and tortoise covers 1/8 and 1-1/8-1/5=27/40
using formula time =distance/speed
1/8x=27/40y
5y=27x (1)
let new speed of hare is z
to tie the race hare has to cover 7/8 in the same time in which the tortoise cover 1/8
so 7/8z=1/8y
z=7y (2)
from (1) & (2)
z=37.80x

hence option 4 

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[v.aruna]

TFAnswers >> Quantitative Ability >> Modern Maths

Question # 13435

a hallow cube of size 5cm is taken with a thickness of 1cm.if the 4 faces of the outer surface of the cube are painted,tatall how many faces of the smaller cubes remain unpainted?

Options

1)  488 2)  800 3)  500 4)  900

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[v.aruna]

TFAnswers >> Quantitative Ability >> Modern Maths

Question # 13436

on the planet OZ, there are 8 days in a week.sunday to saturday and another day called OZ day.there are 36hrs in a day and each hr has 90 mnts whilw each minute has 60 secs.as on earth,the hours hand covers the dial twice a day. find the approximate angle b/w the hands of a clock on OZ when the time is 12:40?

Options

1)  111 2)  89 3)  71 4)  251

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[v.aruna]

TFAnswers >> Quantitative Ability >> Modern Maths

Question # 13437

the pace length p is the distance between the rear of two consecutive footprints.for men the formula n/p=144,gives an approximate relationship b/w n and p.where n=no. of steps per min,p=pace length in meters.bernard know his pacelength is 164cm.t formula applies to bernard walking.caluculate bernards walkin in kmph

Options

1)  8.78 2)  236.16 3)  23.62 4)  11.39

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[v.aruna]

TFAnswers >> Quantitative Ability >> Modern Maths

Question # 13438

anoop managed to draw 7 circles of equal radii with their centres on the diagonal of the square such that the two extreme circles touch two sides of the square and each middle circle touches two circles on either side. find the ratio of radius of the circle to the side of the square

Options

1)  no option 2)  no options

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[v.aruna]

TFAnswers >> Quantitative Ability >> Modern Maths

Question # 13439

given a collection of points p in a plane ,a 1-set is a point in p that can be separated from the rest by a line ,i.e.the point lies on one side of the line while the oters lie on other side.the no of 1-sets of p is denoted by n1(p).the max value of n1(p) over all configurations p of 10 points in the plane is

Options

1)  9 2)  10 3)  3 4)  5

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[v.aruna]

TFAnswers >> Quantitative Ability >> Modern Maths

Question # 13440

planet fourfi resides in 4-dimensional space and thus the currency used by its residents are 3-dimensional objects.the rupee notes are cubical in shape while their coins are spherical.hoever the coin minting machinarylays out some stipulations on the size of the coins *the diameter of coins should be atleast 64mm and not exceed 512mm *given a coin,the diameter of next largercoin is atleast 50% greater *the diameter of coin must always be an integer you are aksed to desgn a set of coins of different diameters with the requirements and ur goal is to design as many coins as possible. how many coins can u design?

Options

1)  8 2)  9 3)  6 4)  5

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[thirumoorthy]

TFAnswers >> Quantitative Ability >> Modern Maths

Solution to Question # 13439

In Simple we can say whtever be the number of points that will be the answer.
Because the given points are not collinear .Hence they are on different positions and so they're considered as individual sets

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[thirumoorthy]

TFAnswers >> Quantitative Ability >> Modern Maths

Solution to Question # 13436

Given that ,
  A day has 36 hours and a hour has 90 minutes
  Full rotation of the hour hand covers 360 degree with 18 hours
  Full rotation of the minute hand covers 360 degree with 90 minutes 
Angle traced by hour hand:
    Convert the given time into hours
     So 12.40 means 112/9 hours
                (360/18)*(112/9)=2240/9
Angle traced by minute hand:
  Here consider the minutes only
        (360/90)*40=1440/9
Hence
     (2240/9)-(1440/9)=800/9
                                 =88.88
Approximately we can say  89 degrees

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[shil_28]

TFAnswers >> Quantitative Ability >> Modern Maths

Question # 13441

A mixture of milk and water measures 60 litres. It contains 20% water. How many litres of water should be added to it so that water may be 25%?

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[shil_28]

TFAnswers >> Quantitative Ability >> Modern Maths

Question # 13442

A man lent Rs.2000, part of this at 4% and the rest at 6% per annum simple interest. The whole annual interest amounted to Rs.92. How much did he lend at 6%?

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[shil_28]

TFAnswers >> Quantitative Ability >> Modern Maths

Question # 13443

There are two vessels A and B in which the ratio of milk and water are as 5:2 and 8:7 respectively. Two litres are drawn from vessel A and 3 litres from vessel B, and are mixed in another empty vessel. What is the ratio of milk and water in it?

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[reddevil4mhell]

TFAnswers >> Quantitative Ability >> Modern Maths

Question # 13442

A man lent Rs.2000, part of this at 4% and the rest at 6% per annum simple interest. The whole annual interest amounted to Rs.92. How much did he lend at 6%?

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x be dat of 4% & y b dat of 6%
x+y=2000
.04x+.06y=92
solving y=600

[ksingh36]

TFAnswers >> Quantitative Ability >> Modern Maths

Solution to Question # 13441

4

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