self Maths Puzzle

What is the missing number
15,30,?,40,8,48,....

Read Solution (Total 3)

ans : 10
solution:
15 *2 = 30
30 /3 = 10
10 *4 = 40
40 /5 = 8
8 * 6 = 48
10 years agoHelpfull: Yes(10) No(1)

15*2=30
10*4=40
8*6=48
so answer is 10
10 years agoHelpfull: Yes(1) No(0)
10 is the correct answer....
10 years agoHelpfull: Yes(0) No(0)

self Other Question

From 4 gentlemen and 4 ladies a committee of 5 is to be formed. The committee consists of a President, a Vice-President and three Secetaries. what is the number of ways of selecting the committee with at least 3 women such that at least one women holds the post of either a president or a vice- president. Today is friday.After 62 days it will be?