Which flower has two lips?

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?

Find the next number in the sequence

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

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

Find the next number in the series below

21 32 54 87 131 ?

In a supermarket, there is an intelligent glass pane before a refrigerating unit. This glass pane allows cherries and apples through it but does not allow grapes and Orange to pass through it.

Can you identify the rule that the glass pane is following?

Spot what is wrong here in below Picture?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

What has many teeth, but cannot bite?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.