Maths Aptitude Questions Types For Entrance Exams and Recruitment Preparation

Age Is Just A Number!

10 years back, Latha was half of Uma's age. If the ratio of their present ages is 3:4, what will be the total of their present ages?

Answer

May the present age of Latha and Uma be 3x and 4x

10 years ago, Latha was half of Uma's age

(3x-10) = 1/2(4x-10)
6x-20 = 4x - 10
2x = 10
x = 5

Sum of the current ages:

3x+4x=7x

7x = 7*5= 35

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Number Series

Find the missing number from 2, 7, 14, 23, x, 47.

Answer

The sequence provided contains +5, +7, +9, --

2+ 5 = 7, 7 + 7 = 14, 14 + 9 = 23, 23+11=x, x+13=47

x = 23 + 11 = 34.

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Equal Numbers And Gender

If 5 women or 8 girls can do a work in 84 days. In how many days can 10 women and 5 girls can do the same work?

Answer

Here, 5 women is equal to 8 girls to complete a work.
Then, 10 women = 16 girls.
Hence 10 women + 5 girls = 16 girls + 5 girls = 21 girls.
8 girls can do a work in 84 days then 21 girls can do a work in (8*84/21) = 32 days.
Thus, 10 women and 5 girls can a work in 32 days

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Ratio Ride

If a: b = 3:4, b:c = 7:9, c:d = 5:7, find a:d?

Answer

a/d = (3/4)*(7/9)*(5/7) = 5/12

a:d = 5:12

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Race Against Time

In a kilometer race, Meera beats Michille by 50 meters or 10 seconds. What time does A take to complete the race?

Answer

Time taken by Michille to run 1000 meters = (1000 * 10)/50 = 200 sec.
Time taken by Meera = 200 - 10 = 190 sec.

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