What is the sum of the numbers 13, 14, 15 and 16?

Ex 9.1 Q 14 , 15 and 16

The sum of the squares of two numbers is 13 and their product is 6. Find : (i) the sum of the two numbers.

The mean of numbers is 25, seven of these 10 numbers are 13,14,15,16,17,20,21,22 and 32. Find the remaining 3 numbers if these 3 numbers are in the ratio 2 : 3 : 5

If the average of five numbers is -10 and the sum of three of the numbers is 16, then what is the average of the other two numbers?

The mean of a data is 15 and the sum of the observations is 195. The number of observations is (a) 13 (b) 19 (c) 16 (d) 17

If four numbers in A.P. are such that their sum is 50 and the greatest number is 4 times the least, then the numbers are (a) 5, 10, 15, 20 (b) 4, 10, 16, 22 (c) 3, 7, 11, 15 (d) none of these

The average (arithmetic mean) of three numbers is 57. If one of the numbers is 16, what is the sum of the other two?

There are four numbers in A. P., the sum of the two extremes is 8, and the product of the middle two is 15. What are the numbers?

If N, the set of natural numbers is partitioned into groups S_(1)={1},S_(2)={2,3},S_(3)={4,5,6,7},S_(4)={8,9,10,11,12,13,14,15},"....", find the sum of the numbers in S_(50).