I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

Chef Andrea has to light the kitchen stoves to open her restaurant for the day. There are three stoves in the kitchen: A glass stove, a brick stove, and a wood stove. She only has one match. Which does she light up first?

Find the next number in the sequence

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

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

If a wheel has 54 spokes, how many spaces are there between the spokes?

Can you make a six-letter word using the letters N, A and B ?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?