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In the following number series only one number is wrong. Find out the wrong number.
18.3, 20.6, 16, 22.9, 13.7, 2.2, 11.4
18.3, 20.6, 16, 22.9, 13.7, 2.2, 11.4
- A2.2
- B16
- C22.9
- D20.6
Answer not set
Discussion 1
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Solution
Multiples of 2.3 are alternatively added and subtracted.
18.3 $+ (2.3 \times 1)$ = 20.6
20.6 $- (2.3 \times 2)$ = 16
16 $+ (2.3 \times 3)$ = 22.9
22.9 $- (2.3 \times 4)$ = 13.7
13.7 $+ (2.3 \times 5)$ = 25.2 $\neq 2.2$
25.2 $- (2.3 \times 6)$ = 11.4
Multiples of 2.3 are alternatively added and subtracted.
18.3 $+ (2.3 \times 1)$ = 20.6
20.6 $- (2.3 \times 2)$ = 16
16 $+ (2.3 \times 3)$ = 22.9
22.9 $- (2.3 \times 4)$ = 13.7
13.7 $+ (2.3 \times 5)$ = 25.2 $\neq 2.2$
25.2 $- (2.3 \times 6)$ = 11.4