Question

Fill in the missing number:
1799, 899, 449, ?

• A. 333
• B. 114
• C. 111
• D. 224
• E. None of the above

Answer 1

The correct option is D 224

1799 - 899 = 900
899 - 449 = 450 $(=\frac{1}{2}\times 900)$
$\therefore$ 449 - ? = $\frac{1}{2}$ $\times$ 450 = 225
$\therefore$ ? = 449 - 225 = 224.