Cristina was born in 1888. She just had her 30th birthday today how did that happen?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

On 26-01-2022, Juli was murdered at her house in a city in India in the afternoon. There were three suspects in the murder and the following are the statements that were given by them:

John: I visited my village that day.
Jacob: I was out to deposit my house tax in the municipality office at that time.
Jonny: I was at a friend's place having lunch at that time.

Can you find out who is the murderer?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Which digit occurred maximum times between the number 1 and 1000?

In the following series, a set of numbers is progressing with a particular pattern. Can you deduce that pattern and find the missing set?

(2 + 6), (21 + 6), (58 + 6), (119 + 6), ___

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

How many triangles are there on the puzzle below?