How many words can a pen with half refill write?

What happened when the wheel was invented?

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

Buy me, smell me or deliver me, I do not change.

Who am I?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

There's a day, that comes around once a year.
To celebrate the man, you hold dear.
He gave you life, love and will pick you up if you fall.
When it comes to guys like him, He's the best of all.
Who is he?

Can you count the number of quadrilaterals in the picture below?

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