Can you place six X (crosses) in below board without making three in a row in any way ?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

At the local model boat club, four friends were talking about their boats.

There were a total of eight boats, two in each colour, red, green, blue and yellow. Each friend owned two boats. No friend had two boats of the same colour.

Alan didn't have a yellow boat. Brian didn't have a red boat but did have a green one. One of the friends had a yellow boat and a blue boat and another friend had a green boat and a blue boat. Charles had a yellow boat. Darren had a blue boat, but didn't have a green one.

Can you work out which friend had which coloured boats?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

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?

Can you replace the question mark with the correct number?

Find the hidden tiger in the given optical illusion ?

Optical Illusion Eye Test: You Have A Brain Like Computers If You Can Spot Two B's Among R's In 8 Seconds!

Find the number of squares in the below-given picture.

I taste better than I can smell. Who am I?