Oral puzzles

Jai Ganesh · 2020-08-30 00:17:14

Hi,

#4820. Find the number of boys in a school if the total number of students in the school is 500 and out of these 500 students, 32% student are males?

Jai Ganesh · 2020-09-01 00:11:43

Hi,

#4821. Two numbers A and B are such that the sum of 5% of A and 4% of B is two-third of the sum of 6% of A and 8% of B. Find the ratio A : B.

Jai Ganesh · 2020-09-02 00:22:06

Hi,

#4822. Roger's annual salary is $15,000. If his salary is increased by 15%, then what will be his increased salary?

Jai Ganesh · 2020-09-04 00:03:15

Hi,

#4823. The speed of a car is 50 kilometres per hour. If we increase the speed of the car by 20%, how much time will it take to cover 120 kilometres?

Jai Ganesh · 2020-09-06 00:03:34

Hi,

#4824. Two students appeared in an examination. One of them secured 6 marks more than the other and his marks was 52% of the sum of their marks. Find the marks obtained by the better student.

Jai Ganesh · 2020-09-08 00:02:57

Hi,

#4825. The price of sugar is reduced by 20%, which allows a saving of $2 per kilogram. Find the new price.

Jai Ganesh · 2020-09-10 00:24:50

Hi,

#4826. In an annual examination, 'A' got 10% less marks than 'B' in mathematics. 'A' got 81 marks. Find the marks of 'B'.

Jai Ganesh · 2020-09-11 00:48:23

Hi,

#4827. In an examination, 65% of the students passed in mathematics, 48% passed in physics, and 30% passed in both. How much percent of students failed in both the subjects?

Jai Ganesh · 2020-09-12 00:22:01

Hi,

#4828. In an examination, 1100 boys and 900 girls appeared. 50% of the boys and 40% of the girls passed the examination. Find the percentage of candidates who failed.

Jai Ganesh · 2020-09-14 00:05:07

Hi,

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#4829. The length, breadth, and height of a cubic room are increased by 5%, 10%, and 50% respectively. Find the percentage change in the volume of the room.

Jai Ganesh · 2020-09-16 00:05:26

Hi,

#4830. A number is mistakenly divided by 10 instead of being multiplied by 10. Find the percentage change in the result due to this mistake.

Jai Ganesh · 2020-09-18 00:05:27

Hi,

#4831. The population of a city is 500,000. The rate of increase is 20% per annum. Find the population at the start of the third year.

Jai Ganesh · 2020-09-20 00:03:44

Hi,

#4832. An examination of 300 marks needed to be passed by securing 30% marks. Kevin secured 20% more marks than the passing marks. Find the percentage of marks obtained by him.

Jai Ganesh · 2020-09-22 00:04:43

Hi,

#4833. The marked price of a table is $12,000. If it was sold for $10,500, after allowing a certain discount, find the rate of discount.

Jai Ganesh · 2020-09-24 00:08:53

Hi,

#4834. The price of a shirt and a trouser are in the ratio 7:5. The price of a shirt is $200 more than the price of a trouser. Find the price of the trouser.

Jai Ganesh · 2020-09-26 00:08:16

Hi,

#4835. The value of a car depreciates every year by 10%. If the present value is $50,000, find the value of the car after 2 years.

Jai Ganesh · 2020-09-28 00:02:12

Hi,

#4836. A number is mistakenly divided by 5 instead of being multiplied by 5. Find the percentage error.

Jai Ganesh · 2020-09-30 00:03:43

Hi,

#4837. In what time will a 100 metre long train running with a speed of 50 kilometres per hour cross a pillar?

Jai Ganesh · 2020-10-01 00:05:37

Hi,

#4838. Find the time taken by a 160-meter long train running at 72 kilometers per hour in crossing an electric pole. (in seconds).

Jai Ganesh · 2020-10-03 00:04:35

Hi,

#4839. A train 125 meter long passes a man, running at 5 kilometers per hour in the same direction in which the train is going, in 10 seconds. Find the speed of the train in kilometers per hour.

Jai Ganesh · 2020-10-05 00:12:37

Hi,

#4840. The average of 24 students and the principal is 15 years. When the principal's age is excluded, the average decreases by 1 year. What is the age of the principal?

Jai Ganesh · 2020-10-07 00:06:32

Hi,

#4841. The average weight of 10 students in a school is 63 kilograms. 5 new students join the group and the average becomes 65 kilograms. Find the average weight of the 5 new students.

Jai Ganesh · 2020-10-09 00:17:27

Hi,

#4842. Of the three numbers, the first is twice the second and the second is twice the third. The average of the reciprocal of the numbers is 7/84. Find the largest number.

Jai Ganesh · 2020-10-11 00:08:28

Hi,

#4843. The average age of a family of 5 members is 20 years. If the age of the youngest member be 12 years, what was the average age of the family at the time of the birth of the youngest member?

Jai Ganesh · 2020-10-13 00:08:00

Hi,

#4844. A car owner buys gas at $7.50, $8.00, and $8.50 per liter for three consecutive years. What, approximately, is the average cost per liter of gas if he spends $4,000 each year?

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#6676 2020-08-30 00:17:14

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