Spot 5 differences in two Christmas tree below:

John was born on March 5, 1970, in Delhi, India. Jacob was born 25 days before John. The year when they took birth, Republic Day fell on Monday.

Can you find out on what day was Jacob born?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

How many triangles are there on the puzzle below?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Find the last number in the series below:

voN luJ yaM raM ---

What has no start, end, or centre?

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

Can you replace the question mark with the correct number?