Missing Number Mystery
A sequence of numbers follows a certain pattern:
3, 7, 15, 31, ___, 127
What number should replace the blank?
Dive into the world of maths magic! Every day, I will sprinkle your learning journey with 1 or 2 tantalizing questions from 11 plus Maths, GCSE Maths, and even thrilling Maths competitions. Gear up to conquer some of the most challenging brain-teasers in these realms. Let's make maths marvellous!
After thinking about it for some time, you will realise that the pattern for this sequence is just doubling the number then adding one. For example, 3 * 2 is 6 and 6 + 1 is 7 or 15 * 2 is 30 and 30 + 1 is 31. Therefore, to figure out the missing number, we just have to double 31 then add :
ReplyDelete31 * 2 = 62
62 + 1 = 63
63 is the missing number