## 100

Can you arrange four 9's and use of at most 2 math symbols, make the total be 100?

99 / .99
or
99 + 9/9

Can you arrange four 9's and use of at most 2 math symbols, make the total be 100?

99 / .99
or
99 + 9/9

What number should appear next in this sequence?
1 5 12 34 92 252 ?

688. Add the two previous numbers and multiply by 2.

If,
Fernando + Alonso + McLaren = 6
Fernando x Alonso = 2
Alonso x McLaren = 6
Then,
McLaren x Fernando = ?

3 or 0.75
Explanation:
Rewriting the last 2 equations in terms of Alonso,
Fernando = 2/Alonso
McLaren = 6/Alonso
Replacing above values in equation "Fernando + Alonso + McLaren = 6"
2/Alonso + Alonso + 6/Alonso =6
(2 + Alonso^2 + 6)/Alonso = 6
8 + Alonso^2 = 6Alonso
Alonso^2 - 6Alonso + 8 = 0
(Alonso - 4) (Alonso - 2) = 0
Therefore;
Alonso = 4 or 2
Let's take value of Alonso as 2
Fernando = 2/2 = 1
McLaren = 6/2 = 3
Therefore;
McLaren x Fernando = 3 x 1 = 3
Let's take value of Alonso as 4
Fernando = 2/4 = 0.5
McLaren = 6/4 = 1.5
Therefore;
McLaren x Fernando = 1.5 x 0.5 = 0.75

Can you find four consecutive prime numbers that add up to 220?

47 + 53 + 59 + 61 = 220

We all know that square root of number 121 is 11. But do you know what si the square root of the number "12345678987654321" ?

111111111
Explanation:
It's a maths magical square root series as :
Square root of number 121 is 11
Square root of number 12321 is 111
Square root of number 1234321 is 1111
Square root of number 123454321 is 11111
Square root of number 12345654321 is 111111
Square root of number 1234567654321 is 1111111
Square root of number 123456787654321 is 11111111
Square root of number 12345678987654321 is 111111111 (answer)

There is a word and six letters it contains.
Take one away and twelve is what remains.
What word is it?

Dozens.

Is half of two plus two equal to two or three?

Three. It seems that it could almost be either, but if you follow the mathematical orders of operation, division is performed before addition. So... half of two is one. Then add two, and the answer is three.

How many times can you subtract 5 from 25?

Just once, because after you subtract anything from it, it's not 25 anymore.

Which is the smallest number that you can write using all the vowels exactly once?

fIvE thOUsAnd (5000).

A clock chimes 5 times in 4 seconds. How many times will it chime in 10 seconds?

11 times. It chimes at zero and then once every second for 10 seconds.