question_answer

The number pattern given below is based on multiplication. Which one of the following numbers will replace the question mark (?) in the pattern?

A) 680   

B)                                640

C) 960                     

D)        320

E) None of these

Correct Answer: B

Solution :

Answer (b) is correct. It is a multiplication pyramid. Clearly, \[5\times 4=20;\text{ }4\times 1=4;\text{ }2\times 1=2\]. And. \[20\times 4=80;\text{ }4\times 2=8\] Therefore, the required missing number \[=80\times 8=640\] Rest of the options is incorrect because of the correctness of option (b).