Square Root 12345678987654321

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?




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A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

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A man died and leaves Rs.10,000 in his will. There are 6 beneficiaries- his 3 sons and their wives. The 3 wives receive Rs.3960 of which Priyanka gets Rs.100 more than Tanu and Neha gets Rs.100 more than Priyanka.
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Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

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Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

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Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

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A cricket has 6 legs, a squirrel has 4 legs and a spider has 8 legs.

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

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Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

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By using all numbers, i.e. 123456789 and subtraction/addition, operators number 100 can be formed in many ways.
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Can you tell me any other solution?

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How can I get the answer 24 by only using the numbers 8,8,3,3?

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