Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

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

John can eat 27 chocolates in an hour, Jacob can eat 2 chocolates in 10 minutes, and Jolly can eat 7 chocolates in 20 minutes. How long will it take them to share and eat a box of 120 chocolates whilst playing Chess?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Can you find out the missing number in the grid?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

What number divided by 4 is the same as that number minus 4?

Which tank will fill first?

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?