Question

Q 26 Find the missing term in the following series,
55, 344, 668, ?, 1429,1870​

Answer 1

Step-by-step explanation:

the answer is 399 it come by. AP

Answer 2

Missing term (?) = 1029

Step-by-step explanation:

The given series:

55, 344, 668, ?, 1429, 1870

To find, the missing term (?) in the given series = ?

The pattern follow:

Previous number + $17^{2}$, Previous number + $18^{2}$, Previous number + $19^{2}$, Previous number + $20^{2}$, ............

344 = 55 + $17^{2}$ = 55 + 289 = 344

668 = 344 + $18^{2}$ = 344 + 324 = 668

? = 668 + $19^{2}$ = 668 + 361 = 1029

1429 = 1029 + $20^{2}$ = 1029 + 400 = 1429

1870 = 1429 + $21^{2}$ = 1429 + 441 = 1870

∴ Missing term (?) = 1029