Can you replace the question mark with the correct number?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Bay of Bengal is in which state?

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

Which Travels Faster? Solve below famous picture riddle:

What is the next number in the series?

15 29 56 108 208 ?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

You have $100 with you and you have to buy 100 balls with it. 100 is the exact figure and you can't go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following balls will you be able to buy:

Green Balls costing $6
Yellow Balls costing $3
Black Balls costing $0.10

Now, how many of each must you buy to fulfil the condition given?

I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?