Multiple choice

In the following number series only one number is wrong. Find out the wrong number. 1250, 1299, 1335, 1355, 1376, 1385, 1389

  1. 1355

  2. 1389

  3. 1250

  4. 1376

  5. 1335

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The series follows a pattern of adding increasing multiples of 7: 1250+49=1299, 1299+36=1335, 1335+25=1360, 1360+16=1376, 1376+9=1385, 1385+4=1389. The term 1355 is incorrect as the sequence requires 1360.