A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

What does this rebus means ?

PROG WORKRESS

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

why number 8549176320 is one of a kind?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

What do you get if you add 2 to 100 four times?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

I have branches, but no fruit, trunk or leaves. What am I?