Can you find out which number multiplied by itself will give the output as 12345678987654321?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

In which direction should the missing arrow point?

Doctor Alex and a bus driver John are both in love with the same woman named Olivia. The bus driver need to go for a long trip of 10 days, Before he left he gave Olivia 10 apples.

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

In the four images below, can you find the odd one out?

How can you take 2 from 5 and leave 4?

Can you name some countries which do not have the alphabet 'A' in them?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

Find out the missing number in the picture attached: