I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Which alphabet is a part of our body?

Find the next number in the series.
1 10 24 43 67 ?

Bay of Bengal is in which state?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

A large water tank has two inlet pipes (a large one and a small one) and one outlet pipe. It takes 3 hours to fill the tank with the large inlet pipe. On the other hand, it takes 6 hours to fill the tank with the small inlet pipe. The outlet pipe allows the full tank to be emptied in 9 hours.

What fraction of the tank (initially empty) will be filled in 0.64 hours if all three pipes are in operation? Give your answer to two decimal places (e.g., 0.25, 0.5, or 0.75).

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?