Question

Find the next number in the pattern:
144, 121, 100, 81, _____

• A. 75
• B. 65
• C. 70
• D. 64

Answer 1

The correct option is D 64

The sequence follows:
144, 121, 100, 81, ____

$144=12\times 12121=11\times 11100=10\times 1081=9\times 9$

We can see that each term of the sequence is the square of a number. It means a number is multiplied by itself.

Also, the number multiplied with itself in the following term is one less than the previous term.

So, the next term in the sequence is the square of 8, which is
$8\times 8=64$