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Replace The Question Mark in the picture with the correct number.

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Sonal asked the class to see if they could find the sum of the first 50 odd numbers. As everyone settled down to their addition, Lavesh ran to her and said, 'The sum is 2,500.' Ms. Sonal thought, 'Lucky guess,' and gave him the task of finding the sum of the first 75 odd numbers. Within 20 seconds, Lavesh was back with the correct answer

How does Lavesh find the sum so quickly and what is the answer ??

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The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.

How far does the dog travel in 1 hour?

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According to number theory of mathematics , a perfect number is a positive integer that is equal to the sum of its positive divisors excluding the number itself.

For example :

6 => 1+2+3

28 =>1+2+4+7+14

I know one more number that is a perfect number and contains not more than 2 digits (i.e 496 won't be consider as it contains 3 digits).

Find the number ?

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Divide 110 into two parts so that one will be 150 percent of the other. What are the 2 numbers?

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Lavesh can paint a a house in just 3 hours.However it takes 6 hours for vishesh to complete the same job.

How long would it take for both to complete the same job?

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Sadaf is selling fruits at brain teasers land.

She sell grapes at $30, Dates costs $25, and a Wolfberry costs $45

At what price does she sell fig ?

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If

1 = 5 ,

2 = 25 ,

3 = 325 ,

4 = 4325

Then 5 = ?

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Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *

x *

=====

* * *

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What number divided by 4 is the same as that number minus 4?