10 second questions

Jai Ganesh · 2020-01-01 00:55:43

Hi,

#7686. The average of first three numbers is double of the fourth number. If the average of all the four numbers is 12, find the 4th number.

Jai Ganesh · 2020-01-03 00:07:07

Hi,

#7687. The average of 9 integers is found to be 11. But after the calculation, it was detected that, by mistake, the integer 23 was copied as 32, while calculating the average. After the due correction is made, find the new average.

Jai Ganesh · 2020-01-05 00:45:58

Hi,

#7688. The average of four consecutive even numbers P, Q, R, and S respectively (in increasing order) is 51. What is the product of P and R?

Jai Ganesh · 2020-01-07 00:43:04

Hi,

#7689. The average height of 27 persons was recorded as 162 centimeters. If the height of Samson was deleted from the observation, the average height reduced by 1 centimeter. What was Samson's height?

Jai Ganesh · 2020-01-09 00:36:39

Hi,

#7690. The average of five numbers is 34.4. The average of the first and the second number is 46.5. The average of the fourth and the fifth number is 18. What is the third number?

Jai Ganesh · 2020-01-11 00:31:57

Hi,

#7691. What will be the average of the following set of scores (rounded off to the nearest integer)?
62, 76, 42, 84, 21, 47, 28.

Jai Ganesh · 2020-01-13 00:16:58

Hi,

#7692. The average of four consecutive odd numbers P, Q, R, and S respectively (in increasing order) is 104. What is the sum of P and S?

Jai Ganesh · 2020-01-15 00:34:05

Hi,

#7693. The average weight of 19 men is 74 kilograms and the average weight of 38 women is 63 kilograms. What is the average weight (rounded off to the nearest integer) of all the men and women together?

Jai Ganesh · 2020-01-16 00:23:23

Hi,

#7694. The average of 9 consecutive positive integers is 63. Find the product of the largest and smallest integers.

Jai Ganesh · 2020-01-18 00:33:24

Hi,

#7695. The present age of Raechel is one fourth of that of her father. After 6 years, the father's age will be twice the age of Kevin. If Kevin celebrated fifth birthday 8 years ago, what is Raechel's present age?

Jai Ganesh · 2020-01-20 00:16:27

Hi,

#7696. The average height of 16 students is 142 centimeters. If the height of the teacher is included, the average height increases by 1 centimeter. Find the height of the teacher.

Jai Ganesh · 2020-01-22 00:43:39

Hi,

.

#7697. The mean of 15 different natural numbers is 13. Find the maximum value of the second largest of these numbers.

Jai Ganesh · 2020-01-24 00:32:35

Hi,

#7698. The average weight of M, N, and O is equal to 65 kilograms. The average weight of M and N is equal to 69.5 kilograms. The average weight of N and O is 66.5 kilograms. What is the weight of N?

Jai Ganesh · 2020-01-26 00:35:23

Hi,

#7699. Find the average of the two-digit numbers, which remain the same when the digits interchange their positions.

Jai Ganesh · 2020-01-28 00:25:33

Hi,

#7700. The average of x, y, and z is 30, and the average of x and y is 20. What is the value of z?

Jai Ganesh · 2020-01-30 00:33:36

Hi,

#7701. The average score of three boys in Mathematics is 30. When the score of a fourth boy is added to the score of the three boys, the average is lowered to 25. What is the score of the fourth boy?

Jai Ganesh · 2020-02-01 01:07:06

Hi,

#7702. The average marks of 13 papers is 40. The average marks of first seven papers is 42 and that of the last seven papers is 35. What are the marks of the seventh paper?

Jai Ganesh · 2020-02-03 00:41:58

Hi,

#7703. Three years ago, the average age of a family of 5 members was 17 years. A baby was born, the average age of the family is the same as what was three years ago. What is the age of the baby?

Jai Ganesh · 2020-02-05 00:47:18

Hi,

#7704. The average weight of 8 persons increases by 2.5 kilograms when a new person comes in place of one of them weighing 65 kilograms. What would be the weight of the new person?

Jai Ganesh · 2020-02-07 00:22:16

Hi,

#7705. The average of 6 numbers is 30. If the average of the first four is 25 and that of the last three is 35, find the fourth number.

Jai Ganesh · 2020-02-09 00:29:48

Hi,

#7706. The average age of a husband and wife, who were born 7 years ago, was 25 years at the time of their marriage. Now, the average age of family, including husband, wife, and a child (born during the interval) is 22 years. What is the present age of the child?

Jai Ganesh · 2020-02-11 00:53:26

Hi,

#7707. There were 24 students in a class. One of them, who was 18 years old, left the class and his place was taken by a newcomer. If the average of the class was thereby lowered by 1 month, find the age of the newcomer.

Jai Ganesh · 2020-02-13 00:30:04

Hi,

#7708. 19 persons went to a hotel for a combined dinner party. 13 of them spent $79 each on their dinner and the rest spent $4 more than the average expenditure of all the 19. What is the total money spent by them (approximately)?

math9maniac · 2020-02-14 04:45:13

Last edited by math9maniac (2020-02-14 05:31:40)

Jai Ganesh · 2020-02-14 15:58:11

Hi,

Good attempt, math9maniac!

#7709. The average of five positive numbers is 213. The average of the first two numbers is 233.5 and the average of the last two numbers is 271. What is the third number?

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#8626 2020-01-01 00:55:43

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#8627 2020-01-03 00:07:07

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#8628 2020-01-05 00:45:58

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