Find three numbers a,b,c between 2 and 18 such that : their sum is 25. if 2,a,b are in AP and b,c,18 are in GP

Three numbers a,b and c are in the A.P if

Find the number of integers between 1 and 100000 having the sum of the digits 18.

If a,b,c are in AP and a^(2),b^(2),c^(2) are in HP, then

If three positive numbers a,b and c are in AP, GP and HP as well, than find their values.

If a, b, c are in A.P, b, c, d are in G.P. and 1/c,1/d,1/e are in A.P. prove that a, c, e are in G.P.

The sum of three numbers in A.P. is 15. If 1, 4 and 19 are added to the numbers, the resulting numbers are in G.P. Find the numbers.

If a, b, c are three natural numbers in AP such that a + b + c=21 and if possible number of ordered triplet (a, b, c) is lambda , then the value of (lambda -5) is

The angle of triangle A, B, C are in AP and C=3A . Find angle B

If a, b, c are in A.P., prove that : b+c,c+a,a+ b are also in A.P.