Self
Maths Puzzle
Numerical Ability
Area and Volume
The sum of all four-digit numbers without repetition using 3, 4, 5, 7 is ... .
a. 1111 (3! + 4! + 5! + 7!)
b. 1111 (3 + 4 + 5 + 7)
c. 4444 (3 + 4 + 5 + 7)
d. 5555 (3! + 4! + 5! + 7!)
e. 1111 (3 + 4 + 5 + 7) (3!)
(need explanation pls)
Read Solution (Total 1)
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- option e and the formula is here number og digits=4;
given digits also=4;
sum of four digits without repetition for any this kind of problem is=(1 1 1 ...n times)*(given digits sum)*(n-1)! - 7 years agoHelpfull: Yes(0) No(0)
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