Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

What is next number in the pattern below:

131 517 192 123 ?

Find the value of "?" in the ball picture Riddle below:

John's five friends Rachel, Jacob, Phoebe, Joey and Chandler live on the same road.

Rachel lives in the house: A, Jacob lives in the house: B, Phoebe lives in the house: C, Joey lives in the house:D, Chandler lives in the house: E

Mathematically
B*C*D = 1260
B + C + D = 2E
2A = E

The road numbers run from 2 to 222.

Can you tell me the house number of each of John's friends?

Can you find out the remainder when 3^300 is divided by 5?