Question

Identify the rule and find the missing number in place of the
6 15 35
77 143 221
323 437 ?
4) 657
(B) 663
(C) 667
(D)700 let me know the answer​

Answer 1

Answer:

If you try to approach this problem by taking the difference between terms you might get confused a bit but there is a different pattern in the given sequence. First-term 6=2×3 where 2&3 are first and second smallest prime numbers similarly 15=3×5, 3&5 are next pair of prime numbers, 35=5×7, 77=7×11, 143=11×13, 221=13×17 and so on.

Therefore next term will be 17×19=323 and 19×23=437.

Step-by-step explanation: