Question

In the following number series, only one number is wrong, find out the wrong number 888, 454, 237, 128.5, 76.25, 47.125

• A. 76.25
• B. 454
• C. 128.5
• D. 237

Answer 1

The Correct Option is A

The given series is:

888, 454, 237, 128.5, 76.25, 47.125

Step 1: Check the Pattern

We observe that each number in the series should roughly be half of the previous number. Let's check:

• 888 to 454: 888 ÷ 2 = 444 (but the next number is 454, not exactly half).
• 454 to 237: 454 ÷ 2 = 227 (but the next number is 237, not exactly half).
• 237 to 128.5: 237 ÷ 2 = 118.5 (but the next number is 128.5, not exactly half).
• 128.5 to 76.25: 128.5 ÷ 2 = 64.25 (but the next number is 76.25, which is too large).
• 76.25 to 47.125: 76.25 ÷ 2 = 38.125 (but the next number is 47.125, which is too large).

Step 2: Identify the Wrong Number

As we can see, the pattern of halving is disrupted at the number 76.25.

The expected value after 128.5 should have been 64.25, but the actual value is 76.25, which is too large.

Conclusion

The wrong number in the series is 76.25.