Question

Question based on sum of multiplication -
Solve and find correct option ( Get a brainliest user title! coz gosh this question sucks.)
A B C D E
x 4
----------------
E D C B A
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QUESTION -
Value of A is -
1) 7
2) 2
3) 8
4) 4

Answer 1

First it is obvious that A is even number,,,,as abcde is multiplied by 4.

Now,,,A can't be equal to zero because if A is 0 ABCDE will become 4 digits number,,,,

now,,,since A is even and not zero,,,,,now if we take value greater than 2 ,,,,,then 4A will become more than 10,,,,and hence after multiplying with 4 ,,ABCDE will surely become More than 5 digits... which is not thr case.

so value if A is 2

Answer 2

21978 * 4 = 87912

Look at the A in ABCDE. A can be only 1 or 2 because E can be 9 at the most. On the other hand, we look at the A in EDCBA. We found that A must be an even number, which should be 2. Since E x 4 produces a number within the one's place as 2, we know E must be 8. Since there is no carry from B x 4 to E's place, we know B must be 1. Since B = 1, we know D x 4 will produce a number within one's place as 8 so that 8 + 3 (carry) = 11. The only choice for D is 7. C can only be 8 or 9 to make the product of BC x 4 be close to DC. Since E is 8 already, C must be 9.

So ABCDE=21978

Hope it will help you