What is the 10th letter in the English alphabet?

A. J

What is the code for 'WATER' if A=1, B=2, ..., Z=26?

A. 23182018

What is the 15th letter of the English alphabet?

A. O

What is the missing number in the series: 2, 4, 8, 16, ?, 64?

A. 32

In the series A, B, C, D, E, F, G, H, I, J, how many letters are vowels?

B. 4