Find the next number in the sequence

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

I am an odd number. Take away a letter and I become even. What number am I?

Count the number of squares in the picture below.

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

Replace the question mark with the correct number in below Picture:

There are 3 apples in the basket and you take away 2. How many apples do you have now?

Which is faster, Heat or Cold ? Explain.

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

James bond was pushed out of an aeroplane without any parachute.
He survived, How come?