When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

Can you solve this picture maths equation?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

Next Number in the Series,

5, 16, 49, 104, ?

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

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Why 1729 is a magic number? Answer Logically.

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?

how come the second man dies?

What is the difference between a jeweller and a jailer?