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

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Find out the missing number in the picture attached:

You need to arrange three 7 and mathematical symbols to form number 1?

Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)

In the image below, can you find the value of an angle(y)

How do you go from 98 to 720 using just one letter?

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?

While house hunting in London, I came across a very good leasehold property Discussing the lease the landlady told me:

'The property was originally on a 99 years lease and two-thirds of the time passed is equal to four-fifths of the time to come. Now work it out for yourself and see how many years are to go!