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

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

A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?

Chocolate costs 6 rupees and a Toy costs 5 rupees. If you have 32 rupees in total, how many chocolates and how many Toys can be purchased with that amount?

What's a single-digit number with no value?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

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?

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?

Using Only Five 5's and any mathematical operator make sum as 37