Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

Why is the longest human nose just 11 inches?

Which English verb becomes past tense just by rearranging the letters?

Find the next number in the series below.

6 18 270 72090 ?

Count the number of squares in the picture below.

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?