Question

Fill in the missing number
99, 95, 86, 70, ?

• A. 45
• B. 62
• C. 65
• D. 55
• E. None of these

Answer 1

The correct option is A 45

99 - 95 = 4 = $2^2$, 95 - 86 = 9 = $3^2$
86 - 70 = 16 = $4^2$
$\therefore$ 70 - ? = $5^2$
$\therefore$ 70 - 25 = ?
$\therefore$ ? = 45.