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It would be more fun to figure it out by yourself. But let me help you get started. The numbers can be written as ABCDE x 4 = EDCBA. Look at the first "A". If this number is 3 or more, the multiplication by 4 will give you six digits instead of five. So it can only be 1 or 2. Hoever, if you look at the second "A", it has to be even (because the digit "E" is multiplied by 4). So it can only be 2.
For the remaining digits, be sure to remember the numbers that may be carried over from digits further on the right.
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What 4 digit number times 4 equals the same 4 digits backwards?
2178
What numbers is multiple of 4?
There is an infinite number of multiples of 4. Multiples of 4 can be 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, etc. 4 can be multiplied to get those numbers, and that makes them multiples of 4. 4 times 0 equals 0, 4 times 1 equals one, 4 times 2 equals 8, 4 times 3 equals 12, and so on.
What numbers multiplied gaves 76?
2 times 38 equals 76 4 times 19 equals 76
What two numbers times equals 1000?
How about 4*250 = 1000 as one example
what is 4 times what equals 154?
4 times what equals 154 = 616
